Output Frequency:1-100HZRated Power:20WWire or Wireless:WiredDisplay Mode:Head-Up display, car,HUD,OBD+GPS HUDSystem:OBD2+GPSSuitable for: with OBD2/EUOBD InterfaceFunction 1:speedFunction 2:clockFunction 3:Rotating speedFunction 4:VoltageFunction 5:water temperatureFunction 6:travel timeFunction 7:Travel distanceFunction 8:AltitudeFunction 9:Accelerated testingFunction 10:brake testFunction 11:Turbine testFunction 12:engine loadCall the police1:fatigue drivingCall the police2:High water temperature alarmCall the police3:Low voltage alarmCall the police4:Overspeed alarmcharacteristic:auto parts,car accessories,Car electronic accessoriesSpeed unit:- mile, KM/H- kilometerColour:blackMaterial:plasticPackage Contents:1 x Car Only the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.