Features: Car head-up display shows the driving speed in real time, with LED large font, clear and easy to view. GPS and BeiDou dual mode positioning speed measurement, stable performance, quick speed refresh, no delay. Equipped with shading plate, the display is not easily affected by light, and is clearly visible at day and night. Small size and light weight, non-destructive installation, will not block the line of sight, to ensure the safety of driving. USB plug and play, starts and stop with the car, suitable for car, truck, SUV, buses, motorcycles, etc. Specifications: Model: Set 1(Without Car Charge Adapter) / Set 2(With Car Charge Adapter)(optional) Color: Black Material: ABS Voltage: 12-24V, USB 5V Unit: KM/H, MPH(optional) Item Size: 80 * 32 * 54mm/ 3.1 * 1.3 * 2.1in Item Weight: 45g/ 1.6oz Package Size: 130 * 100 * 40mm/ 5.1 * 3.9 * 1.6in Package Weight: Set 1: 135g/ 4.8oz Set 2: 150g/ 5.3oz Packing List: 1 * Headup Display 1 * USB Cable 1 * Anti-Slip Mat 1 * Car Charge Adapter 1 * Manual