---
product_id: 98290269
title: "7 Function Digital Multimeter AC DC Voltage Resistance Current Transistor Diode Audible Continuity Buzzer and Square Wave Output"
brand: "protechtrader"
price: "Rp490679"
currency: IDR
in_stock: true
reviews_count: 8
category: "Pro Tech Trader"
url: https://www.desertcart.id/products/98290269-7-function-digital-multimeter-ac-dc-voltage-resistance-current-transistor
store_origin: ID
region: Indonesia
---

# 7 versatile measurement functions High contrast LCD for easy reading Audible continuity buzzer 7 Function Digital Multimeter AC DC Voltage Resistance Current Transistor Diode Audible Continuity Buzzer and Square Wave Output

**Brand:** protechtrader
**Price:** Rp490679
**Availability:** ✅ In Stock

## Summary

> ⚡ Power Your Projects with Precision and Confidence!

## Quick Answers

- **What is this?** 7 Function Digital Multimeter AC DC Voltage Resistance Current Transistor Diode Audible Continuity Buzzer and Square Wave Output by protechtrader
- **How much does it cost?** Rp490679 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.id](https://www.desertcart.id/products/98290269-7-function-digital-multimeter-ac-dc-voltage-resistance-current-transistor)

## Best For

- protechtrader enthusiasts

## Why This Product

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

## Key Features

- • **All-in-One Precision:** Measure AC/DC voltage, current, resistance, and more with one sleek device.
- • **User-Friendly Interface:** Color-coded dial and high-contrast LCD screen for effortless, on-the-go readings.
- • **Instant Audible Feedback:** Built-in buzzer ensures quick continuity checks without second-guessing.
- • **Ready to Use Out of the Box:** Includes test leads, 9V battery, and illustrated guide—no extra purchases needed.
- • **Transistor Testing Made Simple:** NPN & PNP transistor tester with hFE gain matching for flawless component selection.

## Overview

The ProTechTrader 7 Function Digital Multimeter is a compact, battery-powered tool designed for professionals and hobbyists alike. It features a high-contrast LCD, color-coded dial, and seven measurement functions including AC/DC voltage, current, resistance, transistor testing, diode testing, audible continuity buzzer, and square wave output. Complete with test leads, a 9V battery, and an illustrated user guide, it offers reliable, precise diagnostics in a portable package.

## Description

ProTechTrader ProTechTrader is a small family business dedicated to our mission on electronics: to teach and provide. ProTechTrader started with just one employee and kept it in the family for ten years. We are committed to supporting DIY, makers, and hobbyists of electronics. We are proud to provide components that can be tricky to find. Our premiere offering is the complete kits that we developed with Charles Platt for his book "Make: Electronics". Perhaps our biggest pride is our dedication to answering questions personally and directly with intent to teach. "Make: Electronics" Kits

Review: Nice lil meter - Bought it to play around with hardware hacking, and it works great for that purpose. Affordable and gets the job done.
Review: Good inexpensive way to measure hFE for gain matching your transistors - I needed a way to gain match a large batch of transistors but couldn't afford one of the expensive tools. This was perfect. The price didn't break the bank. The unit did a great job measuring hFE on all the transistors. I didn't test how well/accurate the rest of the functions are. I just needed it for hFE - awesome for that. Since it was really easy to use for my case, I remeasured all the components several times (needed to be precise). The measurements were consistent.

## Features

- Basic Digital Multimeter with easy to read high contrast LCD Screen for easy to read on the go testing
- Custom Color Coded Symbols for Voltage, Amperage/Current, and Resistance are clearly labeled with their numeric values around the dial
- NPN & PNP Digital Transistor Tester along with a Built in Buzzer for Audible Continuity Test
- Square Wave Signal, hFE Transistor, and Diode Function Testing are some of the advanced features included in this low cost solution
- Comes with an Illustrated User Guide, Test Leads, and Installed 9V Battery

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | ProTechTrader |
| Color | Black |
| Item dimensions L x W x H | 4.8 x 2.6 x 0.9 inches |
| Min. Operating Voltage | 9 Volts |
| Power Source | Battery Powered |
| Style | Basic Digital Multimeter PDM631 |

## Product Details

- **Brand:** ProTechTrader
- **Power Source:** Battery Powered
- **Style:** Basic Digital Multimeter PDM631
- **Color:** Black
- **Item dimensions L x W x H:** 4.8 x 2.6 x 0.9 inches

## Images

![7 Function Digital Multimeter AC DC Voltage Resistance Current Transistor Diode Audible Continuity Buzzer and Square Wave Output - Image 1](https://m.media-amazon.com/images/I/81mwT17oMHL.jpg)
![7 Function Digital Multimeter AC DC Voltage Resistance Current Transistor Diode Audible Continuity Buzzer and Square Wave Output - Image 2](https://m.media-amazon.com/images/I/81nEtyOE1uS.jpg)
![7 Function Digital Multimeter AC DC Voltage Resistance Current Transistor Diode Audible Continuity Buzzer and Square Wave Output - Image 3](https://m.media-amazon.com/images/I/91MY50v9jiS.jpg)
![7 Function Digital Multimeter AC DC Voltage Resistance Current Transistor Diode Audible Continuity Buzzer and Square Wave Output - Image 4](https://m.media-amazon.com/images/I/815OVUBhc1S.jpg)
![7 Function Digital Multimeter AC DC Voltage Resistance Current Transistor Diode Audible Continuity Buzzer and Square Wave Output - Image 5](https://m.media-amazon.com/images/I/31kQB7WDOuL.jpg)

## Available Options

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

## Questions & Answers

**Q: Anybody tried testing transistors?**
A: Yes, I have.   The hFE function measures the DC gain of the transistor when correctly inserted into the circular connector on the left of the multimeter.   You will notice the connector is split for NPN & PNP transistor gain testing respectively with connections for both the Base (B), Collector (C), and Emitter (E) of your transistor.  Be sure to properly insert your transistor leads all the way down on the correct side for NPN or PNP transistors as well as first identifying your transistors Base, Collector, and Emitter leads for proper testing. 

I just uploaded a picture on the listing page shows a transistor having it's hFE DC gain tested which is measured at 349.  This is normal for this transistor and shows it functioning properly.   Common transistor DC gain may be between 50-500, but this varies greatly transistor to transistor.

The picture is not live on Amazon yet, so in the meantime here is a link to it for reference:
https://www.protechtrader.com/image/PDM-711-Digital-Multimeter-hFE-Transistor-DC-gain-testing.jpg

Also uploaded to Amazon a video demonstrating the Square Wave Function Generator Output from the PDM-711 Multimeter:
https://www.protechtrader.com/image/Protechtrader-pdm-711-squarewave-function-generator-demo.mp4

If I can do anything else or if you have any other questions just let me know.   We are a small husband and wife business and customer satisfaction is truly very important to us.

Have a great day!
Al & Amy
aka ProTechTrader

**Q: How loud is the buzzer? Most multimeters have a tiny high-pitch sound that is nearly inaudible and useless to me.**
A: For the continuity test function on the multimeter the buzzer is audible fine for me, and I have never had issues hearing it or had any complaints about it.  Personally I find it very useful for circuit testing, but I have not used it in a very loud environment if that is what you are looking to do.  It would be hard to define without testing on a sound meter, but that said it is about the typical loudness of buzzers in similar multimeters due to the piezoelectric elements used to emit the sound.

**Q: Does this have a warranty?**
A: Hello!
Yes it does have a warranty against factory defects and workmanship for 90 days.  We at ProTechTrader stand by our products and are happy to help our customers with issues so do not hesitate to contact us directly at CS@ProTechTrader.com or through Amazon messaging system.

**Q: Am i able to tune this multimeter to "%hzv", select ac mode? i'm looking into a device that would require this to see if it's working properly.**
A: I just read the user manual... it is available with the listing.  This function is not available on this meter.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nice lil meter
*by D***S on November 5, 2025*

Bought it to play around with hardware hacking, and it works great for that purpose. Affordable and gets the job done.

### ⭐⭐⭐⭐⭐ Good inexpensive way to measure hFE for gain matching your transistors
*by M***L on October 16, 2023*

I needed a way to gain match a large batch of transistors but couldn't afford one of the expensive tools. This was perfect. The price didn't break the bank. The unit did a great job measuring hFE on all the transistors. I didn't test how well/accurate the rest of the functions are. I just needed it for hFE - awesome for that. Since it was really easy to use for my case, I remeasured all the components several times (needed to be precise). The measurements were consistent.

### ⭐⭐⭐⭐ Great value
*by G***R on August 19, 2023*

This small multimeter works well and is accurate (as compared to a Fluke). It has many features, such as transistor tester. The large digit display is a good feature. The test leads are short and the ends don't always make good contact. New leads are not expensive and these are standard banana type that can be easily replaced if needed.

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*Product available on Desertcart Indonesia*
*Store origin: ID*
*Last updated: 2026-03-12*