The device is a small adapter that plugged into the vehicle OBD-connector. Through BT, it connects to any computer or smartphone, with associated diagnostic procedures.   Features: With this product you will be able to perform a complete computer diagnostics car and even to correct minor faults without resorting to service stations.  Measure the fuel consumption.  Display real-time operating performance of the car, such as momentum, vehicle speed, oil pressure, coolant temperature, engine load, intake manifold pressure, throttle position, the values of oxygen sensors, air intake temperature, and more.  Stop communication, wait half an hour, auto sleep.  Download data to external media in a variety of formats for later printing.  Record various parameters, display graphics in real time, and more.   Specifications: Color: black+orange, black, black+red, white+black, white+red, red (optional);  Work temperature range: -20 to +70℃;  Storage temperature range: -40 to +125℃;  RF sensitivity(Basic Rate): -85db;  Frequency Range: 2402-2480MHZ;  Transmission Range: 10M;  Support protocol: compatible with CAN, J1850 PWM, J1850 VPW, ISO9141, KWP2000;  Item Size: 120 * 75 * 40mm / 4.7 * 3.0 * 1.6in;  Item Weight: 30g / 1.1ounce;  Package Size: 120 * 75 * 40mm / 4.7 * 3.0 * 1.6in;  Package Weight: 30g / 1.1ounce;   Packing List: 1 * Car Diagnostic Tool