Car Digital GPS HUD Speedometer 3 inch Head Up Display with Overspeed MPH/KM/H Warning Alarm Black

Feature:1) Head-up display the vehicle driving speed.2) Over speed alarm.3) Driving time and mileage calculation and display4) Easy Setup--Plug & Play---Power through vehicle lighter. No professional installation is required.5) Compatible with all Cars & Trucks. Use GPS signal guided calculation. No wiring needed to the VSS(vehicle speed signal).6) Display by MPH or KM\/h7) Auto adjust brightness through sensor for Day & Night driving.8) Green color speed display, your eye.Colour: BlackType: GPS SpeedometerMaterial: plasticScreen Size:3.0 inchInput Voltage:DC 5VWorking Temperature: -30~80CInput Current: 50~120mA, can be powered by power (It has no built-in lithium battery and only saves the total mileage data when power is off, other data is not saved)Satellite Positioning Speed: 1 to 3 Minutes in open space; no satellite signal when indoor. ( affect satellite positioning speed)Package Includes:1 X GPS Speedometer1 X USB Power Cable1 X Stand1 X clip1 X ManualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.