ON/OFF Power Switch that allows you to keep it plugged in at all times CLEAR engine codes and check engine lights Connect to a Bluetooth enabled computer using the supplied software or an Android Smartphone using one of the many free compatible apps View real-time vehicle data while driving Find and fix problems before they happen Connects wireless via Bluetooth up to 3 meters (no cable connection) Compatible with all OBD II compliant vehicles The latest Printed Circuit Board (PCB) and smallest module design Dimensions: 1.9 x 1.4 x 1 inches Firmware Version: 1.5 (Latest) Software Version: 2.1 Bluetooth Pairing Password: 1234 (sometimes it may be 0000 or 12345) http://www.obd2cart.com/mini-elm327-bluetooth-obd2-automotive-diagnostics-scanner-with-power-switch-p-388.html