BLUETOOTH Mini ELM327 V2.1 OBD2 OBD II Auto Car Diagnostic Interface Scanner. Plug this OBD2 scan tool in your car's OBD2 port, turn on your car, enable Bluetooth on your Android phone or tablet；. 【Excellent Compatibility】- Compatible with all Gasoline vehicles in OBDII interface, which support 9 OBDII protocols.