1、Safe Driving: The head up display holder shows enough information directly to you, which allowing you to maintain constant focus on the traffic, with no extra distraction. Letting you see the navigation instructions clearly without lowering your head 2、Great Compatibility: This HUD is GPS + Beido dual-mode chip. It is compatible with all vehicles around the world. The refresh rate is 10 frames per second, and the speed of the car changes smoothly and continuously. 3、Simple Function: Simple design, minus complicated functions. This HUD can diplay speed, driving direction and the number of satellites. Note:This product working voltage is 5V. Features: Safe Driving: The head up display holder shows enough information directly to you, which allowing you to maintain constant focus on the traffic, with no extra distraction. Letting you see the navigation instructions clearly without lowering your head. Great Compatibility: This HUD is GPS + Beido dual-mode chip. It is compatible with all vehicles around the world. The refresh rate is 10 frames per second, and the speed of the car changes smoothly and continuously. Simple Function: Simple design, minus complicated functions. This HUD can diplay speed, driving direction and the number of satellites. Two Alarm functions: It supports overspeed alarm and fatigue driving alarm. The over speed alarm setting range is 30-250KM/H. HUD will alarm when the vehicle speed reach to the setting value. The fatigue driving alarm setting range is 1 to 8 hours, HUD will give fatigue driving alarm when your continuous driving time reach to the setting value. Compass: N (North) E (East) W (West) S (South), After the satellite is found, the GPS light stops flashing and stays on for normal use. Light Sensor: HUD can automatically adjust the brightness according to the environment. Specifications: Shell color: black Backlight color: white, green(optional) Material: ABS Screen size: 3.5inch Operating voltage: ≤5V Vehicle speed display: display the current vehicle speed Speed unit: MPH- mile, KM/H- kilometer Product size: 8.6 x 3.7 x 1.6cm Package size: 12.5 x 8.5 x 4.4cm Package weight: 130g Packing List: 1 * M1 Head-up Display 1 * USB Cable 1 * Reflective Film 1 * Sticker 1 * English User Manual 1 * M1 Head-up Display 1 * USB Cable 1 * Reflective Film 1 * Sticker 1 * English User Manual