Features: Car headup display shows real-time speed, driving direction, single driving mileage and driving time. 4.2" LED display, supports kilometer and mile switching. Equipped with GPS and BeiDou dual-mode chip, real-time synchronized data, high refresh rate, accurate data, no delay. Support over-speed alarm and fatigue driving reminder, speed and time can be set by yourself, adding safety for your driving. Built-in light sensing system can automatically adjust the screen brightness according to the current environment light brightness, bringing a comfortable visual experience. Made of high-quality ABS and PC, with nice durability, high temperature and corrosion resistance. No built-in battery, no danger of explosion at high temperature. Compact size, will not block the line of sight, USB plug and play, starts and stop with the car, suitable for car, truck, SUV, motorcycles, etc. Specifications: Color: Black Material: ABS + PC Input Voltage: DC5V Input Current: >150mA Working Temperature: -30~80 Working Humidity: 20~85% Item Size: 122 * 62 * 38mm/ 4.8 * 2.4 * 1.5in Package Size: 140 * 61 * 80mm/ 5.5 * 2.4 * 3.1in Package Weight: 180g/ 6.3oz Packing List: 1 * Headup Display 1 * Holder 1 * Power Cable 1 * User's Manual