Why there is a speed error

This is because of the difference in the principle of speed measurement, the car is measured by sensors, while the M2 is measured by GPS

Why is there ghosting?

Because the windscreen is double-layered, there are two reflections, causing the display to appear double-imaged.

How to solve the problem of ghosting?

Please feel free to use the reflective film, which is transparent and will not affect the line of sight. The reflective film has a coating on the inside, which makes the display clearer and greatly reduces the effects caused by ghosting.

How to use reflective film

Remove the protective film from tab 1 and apply the reflective film to the windscreen. Depending on the driving position, observe if M2 is on the reflective film, if not, reapply. Remove label No. 2 by scraping out the air bubbles with a card.

Why does it show 2 horizontal lines and not the speed of the car?

When the machine is first started, two horizontal lines are displayed to indicate that it is searching for a GPS signal. When it goes to 0, it indicates that it is connected to a GPS signal.

Manufacturer	AMHVMU
Part number	M2 WHITE
Item Weight	45 g
Product Dimensions	14 x 9 x 5 cm; 45 g
Item model number	M2
Material	Plastic
Item Package Quantity	1
Included components	cable，manual，non-slip-mat，HUD
Batteries included?	No
Batteries Required?	No

M2 Heads Up Display Car, Windscreen Projector GPS Digital Speedometer Car MPH HUD Display Wireless Speed Meter Plug and Play for All Cars

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