The Newest ELM327 V2.1 Bluetooth V4.0 Auto Diagnostic Tool Mini OBD2 OBDII for Android/IOS/PC The Newest ELM327 V2.1 Bluetooth V4.0 OBD2 is the smallest auto diagnostic tool in the world, size 48mm*25mm*25mm. It can work for Android, IOS device and computers. Function: This Newest ELM327 V2.1 Mini OBD2 can read diagnostic trouble codes and clear trouble codes, turn off the MIL ("Check Engine" light) as well as display current sensor data, it is a convenient way for you to fix some simple problems on your car. Easy to use: Download the Compatible App. Plug it in OBDII adapter, start car engine. enable Bluetooth on your Android phone or tablet, search for "OBDII" and pair with it (pin 1234), run the download App with simple settings, turn on your car and wait until it connects your car's ECU successfully. There is a QR code on the manufacture package, just use your cell phone to have a scan, you can download the App. After installing the App, you need to select the model of your car. This makes the live data more profession and accurate. More powerful and functional. Excellent Quality with 1 year warranty.