M12 OBD2 + GPS Mode Car Head-up Display HUD Overspeed Speed Water Temperature Low Voltage Fault Alarm 1. Screen size: 3.5inch 2. Product size: 90x55x30mm 3. Bare metal weight: 50g 4. GPS mode Display information: driving speed, battery voltage, number of satellites, single driving distance, real-time time, altitude, compass, mile switch, automaticmanual brightness adjustment 5. OBD mode Display information: driving speed, engine speed, water tank temperature, fuel consumption, battery voltage, single driving distance, single driving time, real-time time, power test, clear fault, mile switch, temperature unit switch, automaticmanual brightness adjustment 6. Alarm: overspeed alarm, speed alarm, water temperature alarm, low voltage alarm, fatigue driving reminder, fault alarm 7. Packing list: host x1, OBD cable x1, USB cable x1, non-slip mat x1, reflective sticker x1, manual x1