<p>1. Digital Display: Display speed, water temperature, instantaneous fuel consumption, hour fuel consumption</p> <p>2. Performance Testing: Vehicle acceleration test</p> <p>3. OBD2 Engine Diagnostic Functions: Data flow function display, display color configuration, fault code scanning, fault code clearance and other functions</p> <p>4. Early warning function: Water temperature warning, over speed warning, shift warning.</p> <p>Specifications:</p> <p>Operating voltage: 9-18V DC</p> <p>Operating current: less than 80mA</p> <p>Sleep current: less than 10mA</p> <p>Operating temperature: -20~85\u2103</p> <p>Product volume: 75mm x 55mm x 20mm</p> <p>Speed meter indication error Speed Meter indicates speed and actual speed according to formula :</p> <p>O less than or equal to Vn- less than or equal to (V: + 10) + 4</p> <p>V1- speed meter indicates speed in km\/h</p> <p>V2- an actual speed in kilometers per hour (km\/h).</p> <p>The vehicle speed correction is based on 100km\/h.</p> <p>The error of the vehicle in the low speed state is the reason why the original vehicle meter is not linearly displayed.</p> <p>Specifically, you can connect to the OBD socket test with a dedicated instrument in the 4s shop.</p> <p>colour: black</p> <p>Material: ABS</p> <p>Package Contents:</p> <p>1 x host</p> <p>1 x OBD cable</p> <p>1 x Chinese and English manual</p> <p>Only the above package content, other products are not included.</p> <p>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.</p>