---
product_id: 1558795
title: "PB-688AC Black"
brand: "nsd"
price: "Rp214368"
currency: IDR
in_stock: null
reviews_count: 7
url: https://www.desertcart.id/products/1558795-pb-688ac-black
store_origin: ID
region: Indonesia
---

# Built-in digital LCD speedometer Up to 18,000 RPM torque Military-grade durable materials PB-688AC Black

**Brand:** nsd
**Price:** Rp214368
**Availability:** ❌ Out of Stock

## Summary

> 💪 Spin Stronger, Grip Harder, Recover Faster!

## Quick Answers

- **What is this?** PB-688AC Black by nsd
- **How much does it cost?** Rp214368 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.id](https://www.desertcart.id/products/1558795-pb-688ac-black)

## Best For

- nsd enthusiasts

## Why This Product

- Trusted nsd brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Spin to Win:** Achieve up to 18,000 RPM with no batteries or cords—pure manual power for elite grip strength.
- • **Instant Control:** Spring-assisted auto-start and reverse-stop feature lets you seamlessly switch between sets with full control.
- • **Precision Performance:** Integrated digital LCD counter tracks your RPMs in real-time, so you never miss your progress.
- • **Rock-Solid Durability:** Crafted with military-grade plastic, zinc rotor, and stainless steel axle for vibration-free, stable workouts.
- • **Rehab & Recovery Ready:** Designed to boost blood flow, ease stiffness, and rebuild wrist strength—perfect for injury recovery and pain relief.

## Overview

The NSD Manual Spring Assisted Start Spinner Gyro Ball is a premium, battery-free wrist and forearm strength trainer capable of reaching up to 18,000 RPM. Featuring a built-in digital LCD speedometer, military-grade materials, and a spring-loaded auto-start mechanism, it delivers smooth, vibration-free resistance ideal for athletes, professionals, and rehab users. Compact and durable, it’s designed for effective grip strength training, pain relief, and enhanced wrist mobility anytime, anywhere.

## Description

Stronger Wrists in Seconds – No Strings Attached with the NSD Auto-Start Gyro Ball Level up your performance with the NSD Spinner Auto-Start, a premium grip strength trainer that transforms your wrist and forearm workouts. This high-performance torque ball hand exerciser features an auto-start mechanism—just wind the rotor, release it, and rotate your wrist to engage. No strings, no batteries—just powerful motion-based resistance. Capable of reaching up to 15,000 RPM, this compact gyroscope generates over 26.8 lbs of torque, delivering a sweat-inducing challenge with every spin. Use it as a forearm eåxerciser, hand strengthener or finger strengthener to build power, endurance, and control. Ideal for athletes, active professionals, and anyone seeking compact, effective hand strengthening devices. Unlike generic grip strength trainers, the NSD Spinner Auto-Start is made in Taiwan under strict quality control. Its modular, precision-built design allows easy maintenance— no hassle. Engineered for durability, it’s an arm trainer built to withstand intense daily use. Take it anywhere—this fitness equipment is ultra-portable and break-resistant. Use it at your desk, in the gym, or between sets. Whether you're using it for wrist rehabilitation, as part of your workout equipment, or for general grip strength training, you’ll feel the results with just a few minutes a day. This isn’t just exercise equipment—it’s the key to unlocking peak performance. Whether you're pushing for better lifts, more controlled movements, or improved joint health, this hand grip strengthener delivers. Train smarter. Recover faster. Spin stronger—with the NSD Auto-Start grip strengthener and feel the momentum build

Review: Makes exercising your wrist and forearms fun - Of all the things I saw at CES, this was the only item I decided to buy. I actually found their competitor, DynaFlex Powerball first but decided to go with the NSD Spinner brand instead because it sounded like they were more on top of customer service. I also liked that they had an affordable wind up version that didn't require using the cord. You wind it up by turning the ball in the direction of the arrow (see picture attached, the arrow is embossed into the green part.) I'd read these kinds of balls were popular with rock climbers as a forearm exercise and it was fun to use, so I decided to give it a shot Pros: - Don't have to worry about losing a cord. You can take this thing with you anywhere and give it a spin. - Easy to use - I find myself picking this up while I'm watching TV or just walking around. - Helps with wrist / forearm pain - I have pretty bad pain from using the computer too much, and I found using the ball helped me stretch my forearms and hands and helped reduce the pain a lot - I can't validate, but when I have the ball spinning on high RPMS it takes a lot of effort to maintain my grip on the ball so I feel like I'm doing something to build up my strength. Cons: - If you have sweaty hands like I do, it's sometimes tough to wind up the ball - Very confusing lineup of options. I recognize in the end reading and taking note of the titles is super important. Here's an overview of the lineup - ~$20 : NSD Power Essential Spinner = regular ball, no counter to show rpms, no self starter, vibration free to 15,000 RPM ~$30 : NSD Power AutoStart Spinner Gyroscopic Wrist and Forearm Exerciser with Auto Start Feature = regular ball, no counter to show rpms, w/ self start, vibration free to 15,000 RPM ~$40 : NSD Power Winners Roll and Spin Spinner Gyroscopic Wrist and Forearm Exerciser with Digital LCD Counter and Auto-Start Feature = ball w/ rpm meter, w/self start, vibration free to 15,000 RPM **what I got** ~$50 : NSD Roll 'N Spin Rainbow Lit AutoStart Spinner Gyroscopic Wrist and Forearm Exerciser with AutoStart and Multi-Lit LED = = ball no counter to show rpm, w/ self starter, has LED lights that light up to different colours depending on how fast you're spinning, vibration free to 15,000 RPM ~$75 : NSD Power Winner's Precision Sterling Spinner Gyroscopic Wrist (SILVER COLOUR) = ball w/rpm meter, NO self starter. Vibration free to 15,000 RPM. Delivers more resistance than the plastic balls. Inertial resistance: 19kg at 10,000rpm (350Hz) 3.2kg at 10,000rpm (450Hz) "up to 41.3lbs" ~$75: NSD Power Ultimate Winner's Precision Sterling Spinner Gyroscopic Wrist (GOLD COLOUR) = ball w/rpm meter, NO self starter. Designed to deliver higher RPMS. Claims vibration free operation at up to 27,000 RPM. Overall, since these aren't expensive, it was worth it for me to try out. Update: I still love this ball but I recommend not leaving it anywhere really hot. Since I take this ball with me everywhere, I'd left it in the car overnight in the hot summer weather and I think the glue that held the grip band to the ball melted. Now I can't keep the rubber grip on the ball when I spin as easily.
Review: Topic: Gyroscopic - I have used the NSD Spinner for several weeks, so now feel comfortable sharing user experience. On a positive note, it is a unique little object that offers a bit of fun with conditioning benefits. This item kept "popping up" online, while researching exercise/therapy tools for recovery of broken arm. So, (in 4-5th month post break)..I've been using it about 5-10 min. per day. I do feel some subtle results in grip strength & flexibility, and for that it has been well worth the purchase. The tangerine sized spinner fits nicely in the hand & into my 30 min. daily routine. I also use light weights & "digi-flex" tools, (quite helpful for any possibly reading this, looking for self-help physical therapy). I paid more for the "autostart" feature, lacking coordination to use the "pull string" version. Autostart is a simpler way to get the interior ball/gyroscopic force going. You place thumbs on bottom of ball to "pull/wind" or create tension/resistance..something you readily feel, (not difficult), but you need enough push back to "set it spinning." You then must rotate your wrist & forearm to build up more speed & keep it going. While it is still spinning, you can easily switch the ball from one hand to the other, as one hand will tire..and you can go on this way without a restart..until hands, wrist, arm & fingers weary of the brief whirling workout. I found that moving your wrist in slow, steady paced, deliberate "stirring" circles is best, no need to get "frenzied" or overdo it. You can speed your movements if so desired, however, in "therapy mode," less is more. Note: The instructions provided with the NSD spinner were not that helpful. You can go to their website & view a tutorial if you like or are able to do so, (I could not). In summary, the added cost of the digital counter was not worth my hard earned pennies. I had thought it would be a good thing, because I imagined "harming" myself, if I didn't know how fast it was spinning..etc.. Rest assured, you can simply monitor the force by "feel." If you are more competitive or curious as to how fast you can get the ball spinning, by all means consider the counter. I do think it would be MORE fun to have the spinner that "lights up" & changes color! Unfortunately, I didn't see one offered that had BOTH led lights & autostart feature combo. So, you may want to look for that model, if/when it becomes available. Take care.

## Features

- Track Your Power – This spring-loaded, auto-start torque ball hand exerciser features a built-in speedometer to monitor your RPMs. Just wind the wheel, release, and rotate your wrist to spin past 18,000 RPM (24.9 lbs resistance) and build serious grip strength—no string or battery needed.
- Designed for Active Hand & Wrist Training - This is a performance-based forearm excerciser & gyroscopic wrist strength trainer that requires real hand and wrist engagement to operate. Ideal for athletes, musicians, climbers, and rehab users with basic grip strength.
- Stop Control – The Spring-Loaded Auto-Start feature allows you to stop instantly by just reversing the rotor which ensures smooth transitions between sets, making it a top choice for arm strength trainers & forearm exercisers looking for full control during workout
- Smooth, Stable Performance – Unlike alternatives, this gyro ball spinner is built with military-grade plastic, Zinc Rotor & stainless steel axle for rock-solid balance. No rattles, no vibrations—just consistent resistance for forearm workout
- Recouperating Precision – Designed as a forearm exerciser and finger strengthener, it supports wrist rebuilding, promotes blood flow, and eases stiffness. A smart choice for those recovering from repetitive strain or injury
- Disclaimer: Not a Passive or Automatic Device - Requires manual starting and wrist motion to generate resistance. Users with limited grip strength or wrist injuries may prefer our Electric-Start models.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B007MEWW6M |
| Best Sellers Rank | #29,214 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #6 in Gyroscopic Hand Exercise Balls |
| Brand | NSD |
| Brand Name | NSD |
| Color | Black |
| Country of Origin | Taiwan |
| Customer Reviews | 4.1 4.1 out of 5 stars (1,747) |
| Date First Available | March 3, 2012 |
| Global Trade Identification Number | 00848663000261 |
| Included Components | Battery Free LCD performance tracker, Plastic shells, Stainless Steal axle, Zinc rotor |
| Item Dimensions LxWxH | 5.2 x 4.6 x 2.9 inches |
| Item Package Dimensions L x W x H | 5.2 x 4.84 x 3.07 inches |
| Item Weight | 0.26 Kilograms |
| Manufacturer | Nano-Second Technology |
| Material | Plastic |
| Model Name | PB-688AC Black |
| Model Year | 2021 |
| Package Weight | 0.36 Kilograms |
| Part Number | PB-688AC Black |
| Product Dimensions | 5.2"L x 4.6"W |
| Shape | Round |
| Size | Spring-Start + Counter |
| Sport Type | Airsoft, Baseball, Bowling, Boxing, Canoeing, Climbing, Cycling, Exercise & Fitness, Golf, Hunting, Martial Arts, Tennis, Wrestling |
| Style | With Digital LCD Counter |
| Suggested Users | unisex-adult |
| Tension Level | Extra-Heavy |
| UPC | 848663000261 |
| Warranty Description | If you'd like a copy of the manufacturer's warranty for a product found on Amazon.com, you can contact the manufacturer directly or visit their website for more information, or you can contact our Customer Service team by e-mailing us at: warrantyquestions@amazon.com. If you choose to e-mail our Customer Service team, please include the full name of the product; the model or style, if applicable; … |

## Product Details

- **Brand:** NSD
- **Color:** Black
- **Item Weight:** 0.26 Kilograms
- **Material:** Plastic
- **Style:** With Digital LCD Counter

## Images

![PB-688AC Black - Image 1](https://m.media-amazon.com/images/I/61cnowIaATL.jpg)
![PB-688AC Black - Image 2](https://m.media-amazon.com/images/I/71Jhy5SVbSL.jpg)
![PB-688AC Black - Image 3](https://m.media-amazon.com/images/I/61auw-g+RgL.jpg)
![PB-688AC Black - Image 4](https://m.media-amazon.com/images/I/51EqxlmgcYL.jpg)
![PB-688AC Black - Image 5](https://m.media-amazon.com/images/I/615VQ+hB1BL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Why is this unit more than twice the price of the "acelete auto-start 2.0 power ball wrist trainer ..." ?**
A: I can attest to that. My NSD powerball lasted four and a half years. With the same amount of use, my Acelete lasted only a month and a half.

**Q: noise level ? can I use this at a silent environment like office ?**
A: Yes.  Our surgeons use them in their offices while on the phone.  It makes very little noise. Sort of a brushing sound.

**Q: does it have led light ?**
A: No, all NSD Spinners with ergonomic/rubber band in black are not equipped with LED lights. However, the Speedometer on the top goes with self-powered back LED light when you spin and reach 3,000 RPM.

**Q: What is the difference between the nsd power and nsd titan? the price is as twice as big for titan**
A: Their Material and Size are different. PB-688 series Spinner are made of military-grade plastic while PB-888 Titan series are made of zinc rotor and  Aluminum Alloy shell. PB-688 is a tennis ball sized Spinner while PB-888 is as big as a softball.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Makes exercising your wrist and forearms fun
*by P***N on February 16, 2015*

Of all the things I saw at CES, this was the only item I decided to buy. I actually found their competitor, DynaFlex Powerball first but decided to go with the NSD Spinner brand instead because it sounded like they were more on top of customer service. I also liked that they had an affordable wind up version that didn't require using the cord. You wind it up by turning the ball in the direction of the arrow (see picture attached, the arrow is embossed into the green part.) I'd read these kinds of balls were popular with rock climbers as a forearm exercise and it was fun to use, so I decided to give it a shot Pros: - Don't have to worry about losing a cord. You can take this thing with you anywhere and give it a spin. - Easy to use - I find myself picking this up while I'm watching TV or just walking around. - Helps with wrist / forearm pain - I have pretty bad pain from using the computer too much, and I found using the ball helped me stretch my forearms and hands and helped reduce the pain a lot - I can't validate, but when I have the ball spinning on high RPMS it takes a lot of effort to maintain my grip on the ball so I feel like I'm doing something to build up my strength. Cons: - If you have sweaty hands like I do, it's sometimes tough to wind up the ball - Very confusing lineup of options. I recognize in the end reading and taking note of the titles is super important. Here's an overview of the lineup - ~$20 : NSD Power Essential Spinner = regular ball, no counter to show rpms, no self starter, vibration free to 15,000 RPM ~$30 : NSD Power AutoStart Spinner Gyroscopic Wrist and Forearm Exerciser with Auto Start Feature = regular ball, no counter to show rpms, w/ self start, vibration free to 15,000 RPM ~$40 : NSD Power Winners Roll and Spin Spinner Gyroscopic Wrist and Forearm Exerciser with Digital LCD Counter and Auto-Start Feature = ball w/ rpm meter, w/self start, vibration free to 15,000 RPM **what I got** ~$50 : NSD Roll 'N Spin Rainbow Lit AutoStart Spinner Gyroscopic Wrist and Forearm Exerciser with AutoStart and Multi-Lit LED = = ball no counter to show rpm, w/ self starter, has LED lights that light up to different colours depending on how fast you're spinning, vibration free to 15,000 RPM ~$75 : NSD Power Winner's Precision Sterling Spinner Gyroscopic Wrist (SILVER COLOUR) = ball w/rpm meter, NO self starter. Vibration free to 15,000 RPM. Delivers more resistance than the plastic balls. Inertial resistance: 19kg at 10,000rpm (350Hz) 3.2kg at 10,000rpm (450Hz) "up to 41.3lbs" ~$75: NSD Power Ultimate Winner's Precision Sterling Spinner Gyroscopic Wrist (GOLD COLOUR) = ball w/rpm meter, NO self starter. Designed to deliver higher RPMS. Claims vibration free operation at up to 27,000 RPM. Overall, since these aren't expensive, it was worth it for me to try out. Update: I still love this ball but I recommend not leaving it anywhere really hot. Since I take this ball with me everywhere, I'd left it in the car overnight in the hot summer weather and I think the glue that held the grip band to the ball melted. Now I can't keep the rubber grip on the ball when I spin as easily.

### ⭐⭐⭐⭐⭐ Topic: Gyroscopic
*by C***L on January 19, 2013*

I have used the NSD Spinner for several weeks, so now feel comfortable sharing user experience. On a positive note, it is a unique little object that offers a bit of fun with conditioning benefits. This item kept "popping up" online, while researching exercise/therapy tools for recovery of broken arm. So, (in 4-5th month post break)..I've been using it about 5-10 min. per day. I do feel some subtle results in grip strength & flexibility, and for that it has been well worth the purchase. The tangerine sized spinner fits nicely in the hand & into my 30 min. daily routine. I also use light weights & "digi-flex" tools, (quite helpful for any possibly reading this, looking for self-help physical therapy). I paid more for the "autostart" feature, lacking coordination to use the "pull string" version. Autostart is a simpler way to get the interior ball/gyroscopic force going. You place thumbs on bottom of ball to "pull/wind" or create tension/resistance..something you readily feel, (not difficult), but you need enough push back to "set it spinning." You then must rotate your wrist & forearm to build up more speed & keep it going. While it is still spinning, you can easily switch the ball from one hand to the other, as one hand will tire..and you can go on this way without a restart..until hands, wrist, arm & fingers weary of the brief whirling workout. I found that moving your wrist in slow, steady paced, deliberate "stirring" circles is best, no need to get "frenzied" or overdo it. You can speed your movements if so desired, however, in "therapy mode," less is more. Note: The instructions provided with the NSD spinner were not that helpful. You can go to their website & view a tutorial if you like or are able to do so, (I could not). In summary, the added cost of the digital counter was not worth my hard earned pennies. I had thought it would be a good thing, because I imagined "harming" myself, if I didn't know how fast it was spinning..etc.. Rest assured, you can simply monitor the force by "feel." If you are more competitive or curious as to how fast you can get the ball spinning, by all means consider the counter. I do think it would be MORE fun to have the spinner that "lights up" & changes color! Unfortunately, I didn't see one offered that had BOTH led lights & autostart feature combo. So, you may want to look for that model, if/when it becomes available. Take care.

### ⭐⭐⭐⭐⭐ Review
*by E***E on July 21, 2025*

Works well, excellent for strengthening grip, wrists and forearms.

## Frequently Bought Together

- NSD Power AutoStart Spinner Gyro Wrist Forearm Grip Strengthener with Auto Start Feature
- Hand Grip Strengthener, Finger Exerciser, Grip Strength Trainer (6 PCS),New Material,Forearm Grip Workout, Finger Stretcher, Relieve Wrist Pain, Carpal Tunnel, Trigger Finger, Mallet Finger and More.
- NSD Power Essential Spinner Gyro Hand Grip Strengthener Wrist Forearm Exerciser

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*Product available on Desertcart Indonesia*
*Store origin: ID*
*Last updated: 2026-03-21*