Usage Tips:Bluetooth ELM 327 V2.1 OBD2 Scanner Code Reader Tool ELM327 V2.2 For IOS/Android/PC Bluetooth 4.0 OBD Car Diagnostic Auto Tool 1: Read diagnostic trouble codes, both generic and manufacturer-specific, and display their meaning (over 3000 generic code definitions in the database). 2: Clear trouble codes and turn off the MIL ("Check Engine" light)3: Display current sensor data, including:4: Engine RPM5: Calculated Load Value6: Coolant Temperature7: Fuel System Status8: Vehicle Speed9: Short Term Fuel Trim10: Long Term Fuel Trim11: Intake Manifold Pressure12: Timing Advance13: Intake Air Temperature14: Air Flow Rate15: Absolute Throttle Position16: Oxygen sensor voltages / associated short term fuel trims17: Fuel System status18: Fuel Pressure19: Many others MINI OBD2 Bluetooth 4.0 Scanner Specifications:Communication: Bluetooth 4.0Master Chip: PICI8F25K80Support System: IOS, Android, Symbian, WindowsWorking Voltage: 9v ~ 16vWorking Current: 35mAStandby Current: 25mAOperating temperature: -40 ~ 85 Working Humidity: less than 60%Size: 45mm * 40mm * 20mm Compatible systems:Software support platform: Windows XP, Windows 7/8, IOS, Android, Symbian. Compatible software:Window: ScanMaster-ELM, ScanTool.net, PCMSCAN ELM, etc.IOS: Auto Doctor, Mini OBDIIAndroid: Torque, DashCommand, OBD Car Doctor, Auto Doctor, Mini OBD, EOBD, etc.Symbian: OBDScope