1. Digital Display: Displays speed, water temperature, instantaneous fuel consumption, and hourly fuel consumption 2. Performance Testing: Vehicle acceleration test 3. OBD2 Engine Diagnostic Functions: Data flow display, display color configuration, fault code scanning, fault code clearance, and other functions 4. Early Warning Function: Water temperature warning, overspeed warning, shift warning Specifications: Operating voltage: 9-18V DC Operating current: less than 80mA Sleep current: less than 10mA Operating temperature: -20C to 85C Product dimensions: 75mm x 55mm x 20mm Speed meter indication error: Speed meter indicated speed and actual speed follow the formula: 0 V1 - V2 (V2 + 10) + 4 V1: speed meter indicated speed in km/h V2: actual speed in km/h Vehicle speed correction is based on 100km/h Speed measurement error at low speeds is due to non-linear display of the original vehicle speedometer For accurate testing, connect to the OBD socket using a dedicated instrument at a service center Color: black Material: ABS Package Contents: 1 x host 1 x OBD cable 1 x Chinese and English manual Package includes only the items listed above; other products not included Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowance: +/- 1-3cm