1. Digital Display: Display speed, water temperature, instantaneous fuel consumption, hour fuel consumption<br> 2. Performance Testing: Vehicle acceleration test<br> 3. OBD2 Engine Diagnostic Functions: Data flow function display, display color configuration, fault code scanning, fault code clearance and other functions<br> 4. Early warning function: Water temperature warning, over speed warning, shift warning.<br> Specifications:<br> Operating voltage: 9-18V DC<br> Operating current: less than 80mA<br> Sleep current: less than 10mA<br> Operating temperature: -20~85<br> Product volume: 75mm x 55mm x 20mm<br> Speed meter indication error Speed Meter indicates speed and actual speed according to formula :<br> O less than or equal to Vn- less than or equal to (V: + 10) + 4<br> V1- speed meter indicates speed in km/h<br> V2- an actual speed in kilometers per hour (km/h).<br> The vehicle speed correction is based on 100km/h.<br> The error of the vehicle in the low speed state is the reason why the original vehicle meter is not linearly displayed.<br> Specifically, you can connect to the OBD socket test with a dedicated instrument in the 4s shop.<br> colour: black<br> Material: ABS<br> Package Contents:<br> 1 x host<br> 1 x OBD cable<br> 1 x Chinese and English manual<br> Only the above package content, other products are not included.<br> Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.