The device is a small adapter connected to the vehicle's OBD connector. In Bluetooth, it connects to any computer, tablet or smartphone with associated diagnostic procedures. By doing these simple operations, you can:Measure fuel consumption.Displays real-time car operating performance such as boost, vehicle speed, oil pressure, coolant temperature, engine load, intake manifold pressure, throttle position, oxygen sensor values, air and more.Turn off the MIL (Check Engine signal).Download data to external media in a variety of formats for later printing.Record multiple parameters, display real-time graphs and more.With the kw901, you can perform a full-computer diagnostic car and even fix minor glitches without resorting to service stations.The KW901 scan tool is a high quality automotive scan tool that supports all OBD-II.It is capable of reading and erasing codes, live data, MIL trouble indicator, digital control panel.The Bluetooth adapter works only with the Android device, the WiFi adapter works with Android, IOS device.SpecificationGeneralBrand: Konnwei Model: KW901 Color black Material: PlasticProduct DetailsVoltage Rating (VDD): 12V RF Sensitivity (Basic Rate): -85db Modulation Mode: GFSK Frequency Range: 2402 ~ 2480MHZ Transmission Range: 10M Bluetooth Profile: SPP UART Params: 38400.8, n, 1 Structure small and compact. Connect and never disconnect Stable wireless connection No wires or batteries (adapter is powered by diagnostic size sockets) Stop communication, wait half an hour, sleep automatically Supports all OBDII protocols The adapter uses the fastest and most reliable ARM chips