NOTESuitable for gasoline vehicles with OBD2 interface. Not suitable for diesel and hybrid vehicles. Specification:Display size: 2.0. Inch 2 colors: white light, green light Power supply mode: OBD2 interface Product size: 61.7x63.8x47.1mm/2.43x2.51x1.85 Box size: 14.3x9x5.1cm/5.63x3.54x2.011. Five alarm functions:overspeed alarm, RPM alarm, voltage alarm, water temperature alarm, driving fatigue alarm.2. Function:vehicle speed, water temperature, voltage, fuel consumption, 0-100km/h acceleration test. 3. Automatic photosensitive mode:the photosensitive element allows it to automatically adjust the brightness of the display according to the intensity of the external light, so that it is clearly visible under strong light. 4. Vehicle performance test:0-100km/h acceleration and driving distance test, let you know the vehicles performance status. NoteThe following common vehicle types are not applicable to OBD2: Incompatibility: US models: Dodge, JEEP, Sail, Chrysler, 2004 and pre 2004 models Incompatibility: Legal and Italian models cannot be used: such as Fiat, Maserati, Lamborghini, DS, Logo, Citroen, Renault, Simca, Amilka, etc. Incompatibility: Japanese models not available: Suzuki, Mazda 6, Infiniti (QX50 q50 q501), 2013 Toyota Avanza, Lexus (is250, ex250, ES300H) Honda (jazz, CRV), and cars produced before 2008. Incompatibility: Some Korean Kia and Hyundai models (2013 Hyundai Sonata, 2017 Kia Soul PS, etc.) Incompatibility: All brands of gasoline electric hybrid and diesel vehicles, pickup trucks, motor homes, cars retrofitted with automotive computers, Swiss Volvo, Chrysler Group, and Fiat Group.