Functions:Intelligent GPS vehicle speed and time display: GPS vehicle speed, satellite time, compass, overspeed alarm, driver fatigue reminder.Equipped with high-definition LED screen for clearer information display, ultra-mini design and full of technology.Features a GPS navigation direction compass to help drivers by indicating directions.With a light sensor that adjusts its brightness according to different light, it is very clear in bright light, providing a safer day and night driving experience.GPS+BeiDou dual-mode chip, so you don"'"t need to worry about compatibility issues and latency problems.Powered by the USB cable, automatically powers on and off according to the engine ignition.Compatible with all vehicles around the world, with fast speed refresh and no latency.Just mount the device near the dashboard or use the 360-degree rotating suction cup mount to the windshield.Specification:Model: G4SScreen Size: 2.5 InchMaterial: ABS+PCScreen Type: LEDApplicable models: UniversalColor: Green, WhitePackage Included:1 x G4S HUD1 x Micro USB Cable1 x Anti-Slip Gel Pads1 x Rotary Holder1 x English Manual About Y03 HUD:Functions: GPS and Beidou dual chips, the speedometer is very accurate, and the speed is refreshed quickly without any delay.Innovative design, with sunshine hood itself, good review even under sun.Plug & Play, after connect power supply, it will work directly, no need any other operation.Large font, clearly visible both during the day and at night. Speed unit is KMH (not support MPH). Wide application, it can work on all cars, trucks, buses, E-scooters, E-bikes.The Device is GPS Digital Speedometer, and speed is collected from satellites. So if tested at home or parking lot, perhaps speed can"'"t display correctly. Please test it on the car outside with good signal.Note: it"'"s speed display ONLY, no other function. Specification: Model: Y03Screen Size: 2.8 InchMaterial: ABS+PCScreen Type: LEDApplicable models: Universal for most vehiclesColor: Black and Green Package Included: 1 x HUD1 x Micro USB Cable1 x Anti-Slip Gel Pad1 x ManualDo drop