OBDHUD M7 HUD Head-up Display OBD2 Speedometer ProjectorProduct Features:1. Drive safely, keep your eyes forward, and drive without looking down at the dashboard2. Easy to install, just connect HUD with car OBD port via OBD cable, HUD will show3. when car engine is on/off. Overtime driving alarm, low voltage alarm, overspeed alarm, high temperature alarm, engine failure alarm4. KMH & MPH switch freely. and switch freely5. Applies to: OBD II compliant cars (after 2007).GPS fits all cars6. Installation location: on the center console7. Connection: Connect to car OBD port8. Display information: speed, engine speed, water temperature, driving distance, battery voltage,Head Up Display The main function is to reflect the car dashboard informationDual system GPS system For all carsOBD systemFor OBD2 EOBD Cars OBD system functions: vehicle speed, speed, voltage, water temperature, mileage, overspeed alarm, speed alarm, water temperature alarm, voltage alarmGPS system functions: vehicle speed, voltage, mileage, overspeed alarmHD Display Normal Use under strong light FQA: 1. Q:Is it compatible with diesel vehicles? A:No, diesel vehicles and new energy vehicles are not compatible with the OBD system.2. Q:The speed value is not displayed correctly? A:Enter the setting mode to adjust the speed value.3. Q:Dissatisfied with the product after receiving the product? A:We have a worry-free