This is an intelligent and powerful automotive meter, can help you to see your driving parameters without lower heads. Features: Head-up display the driving speed and altitude. Driving time and mileage calculation and display. Easy setup, plug-and-play, no professional installation is required. Compatible with most car. Use global position system signal guided calculation. No wiring needed to the VSS (vehicle speed signal). Display MPH or KM\/h. Auto adjust brightness through s-ensor for day and night driving. Vehicle driving speed display. Green color speed display, easy on your eye. Over-speed alarm setting. Total mileage display after car stops. Specifications: Main color: black Main material: ABS+PC Screen size: 4.5in Input current: DC50-120mA Item size: 105 * 59 * 16mm \/ 4.1 * 2.3 * 0.6in Item weight: 78g \/ 2.8ounce Package size: 115 * 65 * 71mm \/ 4.5 * 2.6 * 2.8in Package weight: 142g \/ 5.0ounce Packing List: 1 * Car Speedometer 1 * Stand 1 * USB Cable 1 * Rubber Band