Latest Car meter HUD A100S Monitor 2 Driving Computer Over-speed Alarm Voltage Windshield A100S HUD Feature:1. Light r for brightne automatic adjusting.2. Main 4 function can be display:SpeedWater temperatureBattery voltateMilage3. Main 6 options to alert:Over speed: 120KM/HHigh temperature: >120 degreeLow battery voltage: 4 hoursHigh RPM Alarm: low speed with high RPMBeep Alarm4. HUD (Head-Up Display) projects driving data without requiring drivers to look away from their usual viewpoint.5. HUD automatically adjusts its brightne level, so its s are clearly visible in direct sunlight or at night.6. Alerts you if you exceed the speed limit by setting Over-speed buzzing alarm alarm, engine rpm, water temperature, voltage, instant consumption, average consumption, shift remind,igue driving remind, undervoltage alarm, high water temperature alarm, engine fai alarm, KM/MILE free shift, etc.7. Projects a lot of driving information onto a nsparent film on your windshield such as speed, over speed8. Easty installation to work9. Speed Unit: KM/H; MPH