IOKONE 2016 Multi-Languages Elm327 V2.1 Power Switch ON/OFF Super Mini Elm 327 Bluetooth OBD II OBD2 Scanner Work on Android only 1.We provide one year warranty, we would give you refund or sent you replacment if there is any problems. Please feel free let us know when you encounter some problems when using. Thanks for your understanding! 2.Power on/off button: Just press it when you do not want to use it instead of unlpuging it, which is convenience for you to use it. 3.Multi-Languages:Czech, Danish, German, English, Spanish, French, Croatian, Hungarian, Italian, Polish, Serbian, Turkish 4.This ELM327 support TORQUE software for Android system cell phone, OBD scope software for Symbian system cell phone, PPC(Windows Mobile) system cell phone, ScanMaster-ELM for PC etc.