OBDII Main Functions:1.RPM,voltage,driving distance,water temperature,driving time2.Fuel consumption,water temperature,voltage3. RPM unit, Voltageunit(v), Driving distance unit(KM\/), Driving distance unit(KM\/Mile), water temperature unit4.Fuel consumption unit(L\/H, L\/100km)5.All small circle lights turn off when driving speed exceed 50km\/H6.Decorative light(will be turn on all the time when driving)7.All light circle turns off when the RPM exceed 4000r8.Vehicle speed9.Speed unit(KM\/H,MPH)10.Display (from left to right): menu setting,shift reminder,engine fault code,over speed ,light sensor,buzzer mark,fatigue driving,low voltage alarm,high water temperature alarmGPS Main Functions:1. Driving distance&time,voltage2. Driving directions3. Clock,driving time4 Driving distance unit(KM,M)driving time unit(MIN),voltage unit5. Satellite states6. Decorative light(will be turn on all the time when driving)7. Speed (all light turns off when driving speed exceeds 100km \/ H)8. Vehicle speed9.Speed unit(KM\/H & MPH)10.Display (from left to right) :over speed ,light sensor,buzzer mark,fatigue driving,low voltage alarm.Model: S7Working Temperature: -40 Celsius-+80 CelsiusAtmospheric pressure: 86-106KPaRelative humidity: 10%-95%Environmental noise: less than or equal to 60dB(A)Alarm sound level: or equal to 30dB(A)Working voltage: 9V~16Vdc(12Vdc\/400mA)colour:blackMaterial:ABSsize:Screen Size: 13.5*8*1.5(cm)Cable Length: 1mPackage Contents:1* Car HUD Unit1* OBD Cable1* Reflecting Film1* Anti-slip Pad1* ManualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.