KingNeed C61 Universal Head Up Display,GPS Logger +Car GPS HUD with Overspeed Warning, Vehicle Speed with Driving time and Distance Display + Speedometer for car Head-up display GPS Logger projects vehicle speed on windshield+Driving time and distance calculate and display+ offline tracking Compatible with All Cars & Trucks. Use GPS Signal Guided Calculation, No wiring needed to the VSS (vehicle speed signal) Display MPH or KM/h - Simple Push Button Set up+Auto Adjust Brightness thru Sensor for Day & night-time Driving Vehicle Driving Speed Display, Green Colour Speed Display, easy on your eye Over Speed Warning Setting -- Alarm Mute Function.Over-speed warning: a 3 seconds alarm beep and keep flash display will keep warning driver