Is there any provision to keep the clock accurate when power to the unit is off?

It will save the time zone no matter the unit is off, and it could get accurate via GPS satellite signal.

Is the unit rechargable with the usb or must always be plugged in? Can the unit be hardwired?

Hi, Felix. The HUD does not have a battery, so there is nothing to recharge. It must be plugged in in order to be used. But it has a memory, so unplugging it and replugging it doesn't affect the settings. I do it all the time, because I don't want the unit to be "on" when the car is parked, especially in public, and my accessory power socket (aka "cigarette lighter") is always hot. I suppose you could hardwire the unit, but why would you want to? (Messing with your car's wiring is frequently a Bad Idea.) The unit is designed to be powered through the power cord they provide, and I would suggest not using anything else. I don't know how much voltage the unit works on, but it may not be a straight 12v. I don't know whether the supplied power cord changes that.

Will this work on a 2020 toyota prius prime xle?

Sits on the Dashboard and uses 12 volts from the car battery as the power source. Used some Velcro to keep it in place. It came with a lighter plug for power. Hopefully you have that option in your car.

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2019 Best Seller HUD

Product ID: 72788962

Details

Brand
Lttrbx.
Item dimensions L x W x H
3.54 x 2.13 x
Material
Polycarbonate
Number of Items
1
Unit Count
1 Count

📺2.2'' TFT LCD vivid display

🚗Universal GPS compatibility

⏱️Speedup & brake test functions

Description

🚀 Elevate your drive with the ultimate universal HUD—because your car deserves a smarter cockpit.

ALL IN ONE DASHBOARD - Monitor speed, direction, voltage, altitude, and more—switch effortlessly between km/h and mph.
CRYSTAL CLEAR INSIGHTS - 2.2-inch high-definition TFT LCD with multi-color modes and 30° angled display keeps your eyes on the road.
PERFORMANCE AT A GLANCE - Advanced speedup and brake testing functions empower you to understand your car’s dynamics like a pro.
DRIVE SMARTER NOT HARDER - Universal GPS-based HUD works seamlessly with any vehicle worldwide—no compatibility worries.
RELIABLE SUPPORT DURABILITY - Crafted from durable polycarbonate with dedicated customer service ensuring your satisfaction.

The T600 Universal Car HUD is a GPS-based digital speedometer featuring a 2.2-inch TFT LCD display with multi-color options and a 30° viewing angle. Compatible with all vehicle brands and models worldwide, it provides real-time data including speed, direction, voltage, altitude, and supports speedup and brake performance tests. Made from durable polycarbonate, it offers a comprehensive driving assistant with reliable customer support.

Specifications

ASIN	B07FNHGRZ9
Best Sellers Rank	#181,560 in Electronics ( See Top 100 in Electronics ) #51 in Car Overhead Video Players
Brand Name	Lttrbx.
Customer Reviews	4.3 4.3 out of 5 stars (2,120)
Included Components	Yes
Item Dimensions	3.54 x 2.13 x 0.47 inches
Manufacturer	TIMPROVE
Material Type	Polycarbonate (PC)
Model	T600
Number of Items	1
Number of Packs	1
Part Number	4K-ED195
UPC	738447911954
Unit Count	1 Count

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