WIIYII A900 OBD2 HUD Auto Accessories Head Up Display Speed RPM car electronic accessorie Gadgets Inteligentes Projector in car HUD Main Functions & Features: 1.Plug and Play connectivity with any OBDII or EUOBD capable vehicle;2. Screen 3.5-inch HD display3.Multi-color design makes the screen clearer and easier to read4.Nano-technology to eliminate double reflections, more clarity5.Rich Contents: speed, RPM, water temperature, voltage, single driving distance, low voltage alarm, high water temperature alarm, over speed alarm, freely switch between kilometers & miles.6. Auto power on/off: HUD power up and power down with vehicle, effective protection of the car battery with manual switch mode7. 5-level brightness adjustment, automatic and manual brightness adjustment mode 1.Engine RPM2.Alarm(On/Off Option)3.Speed unit at MPH4.Light sensor (Automatically adjust the brightness according to the environment)5.Speed unit at KM/H 6.Voltage icon7.RPM unit8.Water temperature icon9.Multi-function area: speed, water temperature, voltageA. OBDII cable inputB. Power buttonC. Setting button: Three ways of setting button: a. Up button = up motion b. Ok button = inward button presses c. Down button = down motionHUD DisplayPacking1x A900Head Up Display 1 x Non-slip mat1 x Reflective film1 x OBD Cable1 x English User ManualImprove driving safety factor Don"'"t look down at the dashboard data, easily grasp the car condition, focus on the front of the field of vision, improve driving safetyDon"'"t worry about a night outMulti functions interface,choose the one you like1.Vehicle speed means the current driving speed, when driving speed exceeds 50KM/H,the icon will flash and give alarm 2.RPM means present engine speed, when RPM exceeds 5000R, the RPM icon will flash and give alarm3. water temperature means the current water temperature, when water temperature is higher than 120, the icon will flash and give alarm 4.voltage means current battery voltage, when voltage below 11V, the icon will flash and give alarm 5.standard modespeedwater temperature RPM4 kinds practical driving data, easy to switch Press wave key to power on/off key direction, can switch the display information1.Simple mode (only display speed) For: experienced driver 2.Speed + RPM mode For: novice driver 3.Speed /water temperature mode For: too old cars 4.Speed /RPM water temperature mode For:female driver/novice driver4 Alarms:1.Overspeed alarm 2.RPM alarm 3.high water temperature alarm 4.low voltage alarm HUD is for driving safety