A5: China Best Car GPS Speedometer Head Up Display With Car Adaptor

This is a universal GPS speedometer, its speed is from GPS satellites, and standard package include a very good quality car adaptor. Therefore, it can be widely used on cars, trucks, bus, and so on. 

Features
Display information :vehicle speed (KMH or MPH), and compass. 
Alarm information: over-speed alarm.

Easy Setup, Plug & Play
-Power through Vehicle Cigarette Outlet Jack, no professional installation is required. 
-Compatible with all kind of cars and trucks. 
-No wiring needed to the VSS(vehicle speed signal). Could work with a power bank even. 
Real and instance GPS Speedometer
The HUD can get the real vehicle speed from satellite quickly with enhanced GPS module, and update speed each second. 
Dual Display Mode
-Car speed projector, show speedometer on the windshield glass. 
-Normal display, show speed on its own 3.5” LED display. 
Over Speed Warning Setting -- Alarm Mute Function
Driver can set up the setting speed alarm by button. 
When driving speed is over the setting value, it will alarm for 3 seconds alarm beep and flash display will keep warning to the driver. Max display speed s 999KM/H.