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 indicates speed and actual speed according to the formula: V1 V2 (V1 + 10) + 4 V1 speed meter indicated speed in km/h V2 actual speed in km/h Vehicle speed correction is based on 100 km/h The error at low speeds is due to the non-linear display of the original vehicle meter For accurate testing, connect to the OBD socket using a dedicated instrument at a professional service center Color: Black Material: ABS Package Contents: 1 x OBD2 device 1 x OBD cable 1 x User manual in English Note: Light and display differences may cause the item color to vary slightly from the image. Measurement error is +/- 1-3 cm.