Features: HD projection,Safty driving,simultaneous projection, no need to lower your head to know the dashboard data.Multiple display information and alarm status: speed,RPM, water temperature, voltage, single driving distance, low voltage alarm, high water temperature alarm, over speed alarm.Multitocolor design makes the screen projection clearer , without fear of glareNanototechnology to eliminate double reflections, clarity as day and night.Easy to Install, plug and pla ,only need connect the HUD with Car OBD port by OBD cable, HUD will display when car engine on or off.Automatic switch :turn on and turn off with the car,Protect the car battery, you also can use manual switch mode.Easy to use:Flick up and down, long press to switch.Automatic brightness adjustment mode.Specificaitons Compatiable for:Cars in OBD II or CERTIFILE standard or check if there is a car diagnostic socket under the steering wheel.Speed display Unit: KPM,KMH (Exchangable)Display data: Speed, Clock, Oil consumption, RPM, Water temperatureConnection: OBD IIPort (Connect with car OBD port)Notes O BD2 model can work for OBD2 gasoline vehicles produced after 2004 in USA, and OBD2 gasoline vehicles produced after 2008 in othercountries. OBD2 model is not applicable for the following cars: I ncompatibility: American models: Dodge, JEEP, IMSEOER, Chryslerand carsmanufactured before 2004 in USA Incompatibility: French and Italiancarsare not available: Fiat, Maserati, Lamborghini, DS, PEUGEOT, Citroen, Renault, Simcaetc. Incompatibility: SomeJapanesecars arenot available: Suzuki, Mazda 6, INFINITI(QX50 Q50Q501), Toyota AVANZAin 2013, Lexus (is250, ex250, ES300H), Honda (jazz, CRV) and cars manufactured before 2008. Incompatibility: Korean KIAand somecars ofHyundai(2013 Hyundai Sonata, 2017 KIASoul PS, etc.) Incompatibility: Hybrid and diesel vehicles, pickups, RVs, cars with modified automotive computers, Volvo, Switzerland, Chrysler Group, all brand models under Fiat Group. Incompatibility: German cars before 2004For the above cars can not use OBD2 models, please use GPS