Features: 1.Safety Alarm: Car HUD speedometer has speed alarm and fatigue driving alarm, reminding you in time, which can ensure your safety in long distance driving. 2.Key Information Display: Car HUD can display speed, display MPH or km/h, travel time and distance calculation and display, let you know the key information of your trip. 3.Green Light Display: The green light display will protect the driver's eyes and make the driver feel more comfortable, especially for long distance driving. 4.Plug and Play: This HUD calculates and displays real time speed via GPS. No professional installation, no wiring VSS (vehicle speed signal), compatible with all cars and trucks. 5.Anti Slip Bracket: With a rotatable bracket and 2pcs sturdy stickers, the HUD can be fixed on the car console or windshield to prevent the HUD from slipping. specification:Item Type: GPS HUD Material: ABSandPC Colour: Black Function Display: GPS Satellite Speed, Single Driving Mileage, Single Driving Time 2 Major Alarms: Speeding Alarm, Fatigue Driving Alarm Other Functions: Mile Kilometer Switch Power Supply Mode: USB Power Supply Scope of Application: Suitable for all models PackageList: 1 x Car HUD 1 x Bracket 1 x Data Line 2 x Sticker 1 x Manual