Features: HUD display has only one function - display the car driving speed. Fully automatic light sensing, adaptive brightness adjustment, it doesn't have double image even under terrible sunshine at noon. Cn be widely used on SUV ATV Pick-up Truck Scooter Golf Cart Bus Boat Train Bike Motorcycle...all vehicles. Easy install and use, just need connect the USB with our GPS speedometer, then connect to your car. If your car has a USB port, pls plug the USB cable to USB port; if your car doesn't have a USB port, then give it a car adaptor. Plug and Play. Using car USB 5V or cigarette lighter to USB power supply, Automatic power-off when the car is turned off. Specificaitons Type: Car HUD Head Up Display Screen size: 90*45 mm Material: ABS+PC Input signal: GPS Power supply:5V Applicable vehicle: Universal Color light: White / Green Type of plug portType-C Package Included: 1 x Head Up Display 1 x Power cable 1 x Reflective film 1x Double sided tape 1x Manual Special Reminder: The operating voltage of this product is 5V, and a voltage higher than 5V is prohibited. When the satellite is not connected, try putting the product outside the window and wait compatible for 5-10 minutes.