Features: Combine OBD &GPS HUD system into one,free switch 20 kinds of functional data Screen size 5.8 Inch HD display Auto power on/off Automatic and manual brightness adjustment modes Specifications: Working Temperature: -40c-+80c Atmospheric pressure: 86-106KPa Relative humidity: 10%-95% Environmental noise: =60dB(A) Alarm sound level: =30dB(A) Working voltage: 9V~16Vdc(12Vdc/400mA) Screen size: 13.5*8*1.5(cm) HUD Weight: 120g GPS Main Functions: 1.Driving distance&time,voltage 2.Driving directions 3.Clock,driving time 4 Driving distance unit(KM,M)driving time unit(MIN),voltage unit 5.Satellite states 6.Decorative light(will be turn on all the time when driving) 7.Speed icon (all light turns off when driving speed exceeds 100km / H) 8.Vehicle speed 9.Speed unit(KM/H & MPH) 10.Display icon (from left to right) :over speed icon,light sensor,buzzer mark,fatigue driving,low voltage alarm. OBDII Main Functions: 1.RPM,voltage,driving distance,water temperature,driving time 2.Fuel consumption,water temperature,voltage 3.RPM unit,voltage unit(V),driving distance unit(KM/Mile),water temperature unit(/ 4.Fuel consumption unit(L/H, L/100km) 5.All small circle lights turn off when driving speed exceed 50km/H 6.Decorative light(will be turn on all the time when driving) 7.All light circle turns off when the RPM exceed 4000r 8.Vehicle speed 9.Speed unit(KM/H,MPH) 10.Display icon (from left to right): menu setting,shift reminder,engine fault code,over speed icon,light sensor,buzzer mark,fatigue driving,low voltage alarm,high water temperature alarm