G21 Car HD Display GPS Speedometer Car OBD Meter Display Head-Up Display with Suction Cup Holder 1. High-definition LED with automatic light sensitivity adjusts to ambient brightness. 2. Utilizing a dual-mode GPS and Beidou chip, the speed display refreshes quickly and without lag. 3. Equipped with a 360-degree rotating suction cup mount, it allows for flexible adjustment of the viewing angle and supports multiple mounting methods without obstructing the drivers view. 4. Functions: Speed, time, driving time, mileage accumulation, driving distance, altitude, acceleration time, compass, satellite count, speed unit switch, automatic light sensitivity, speeding alarm, and fatigue warning. 5. Features: Mileage accumulation, acceleration time per 100 kilometers, speed unit switch, speed alarm setting, speed tolerance adjustment, etc. 6. Material: ABS + PC 7. Dimensions: 83 x 56 x 18mm 8. Power supply: USB Accessories: Host x 1 USB cable x 1 Double-sided tape x 1 Instruction manual x 1 Small suction cup mount x 1