Can it work on EV electric-vehicle? I want to find a speedometer for my model 3.

If you have a USB port or a cigarette lighter port on your car, (don’t know if they even put lighter ports in cars now) this unit works with all cars trucks and commercial vehicles that do have these ports or outlets. This unit does not show mileage driven only your speed.

How can we switch between mph and km/h?

Hi, thanks for your kind message. may i know where you will use this HUD GPS Speedometer? As far as we know, all cars use speed in MPH in USA, our device only has MPH speed also, we aim to offer a very simple but very accurate Speed Display. If you need display in speed in KM/H, please tell me again, we will introduce another model for you. Thanks again.

How accurate is it? Does any one compare it to car or phone?

I tested it against the GPS program on my phone and it was +/- 2 mph on average..

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VJOYCAR 2023 New Speedometer HUD GPS Digital Speed Meter MPH Speedo Head Up Display for Cars Trucks, USB Cable Plug & Play (G20-Only Green)

VJOYCAR 2023 New Speedometer HUD GPS Digital Speed Meter MPH Speedo Head Up Display for Cars Trucks, USB Cable Plug & Play (G20-Only Green)

Product ID: 539199950

Details

Brand
VJOYCAR
Item weight
0.11 Kilograms
Material
Acrylonitrile
Number of Items
1
Unit count
1 Count

📡GPS-based speed accuracy

🔋Auto on/off power saving

🚗Universal vehicle compatibility

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€ 47.37

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In stock

Sold byAmazon SpainDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Drive smarter, not harder — see your speed in a flash!

PLUG PLAY SIMPLICITY - No setup, no buttons—just USB in and go for instant speed display.
SMART POWER MANAGEMENT - Built-in vibration sensor powers off after 3 minutes idle, saving your battery.
EFFORTLESS INSTALLATION - No films, no OBD ports, no wiring—just stick and drive with included USB cable.
CRYSTAL CLEAR HUD DISPLAY - Bright green digits with zero double images, even under harsh sunlight.
UNIVERSAL GPS SPEEDOMETER - Works flawlessly on cars, trucks, bikes, boats, and more—no engine connection needed.

The 2023 VJOYCAR G20 HUD GPS Speedometer offers a sleek, plug-and-play digital speed display that projects bright green MPH readings directly onto your windshield without any film or double image issues. Compatible with virtually all vehicles, it uses GPS for precise speed tracking independent of your car’s engine or OBD system. Featuring automatic power on/off via vibration sensing, it ensures zero power drain when idle. Easy to install with just a USB connection, this device is perfect for professionals who demand accuracy, simplicity, and a clutter-free dashboard.

Specifications

ASIN	B0BKG5KYXV
Best Sellers Rank	#51,919 in Automotive ( See Top 100 in Automotive ) #123 in Automotive Speedometers
Brand Name	VJOYCAR
Customer Reviews	4.2 4.2 out of 5 stars (1,088)
Included Components	HUD
Item Type Name	Universal HUD GPS Speedometer Digital Speed Meter Head Up Display Plug and Play for Cars Trucks Big Fonts KMH MPH New Car Accessories Electronics Factory Direct Offer Low Cost
Item Weight	0.11 Kilograms
Manufacturer	VJOYCAR
Material Type	Acrylonitrile Butadiene Styrene (ABS)
Model	G20
Part Number	G20
UPC	610521672619
Unit Count	1 Count
Warranty Description	12 months

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