You can connect this service without battery or electric wire,it's equipped with special diagnostic size for power supply to ensure your convenience.This version will stable connection and fast transmission to assist you processing fault quickly.There are over 3000 universal code definitions,including universal code and manufacturer-specific,reading diagnostic fault code and displaying their meaning.This product can only detect 12V gasoline vehicles/ vehicles/hybrid vehicles that comply with OBD2 and EOBD standards.Super mini bluetooth is the newly developed wireless scan tool.Works with all OBD-II compliant vehicles. Wireless (Bluetooth). Software included for Palm, PDA. Software included for Windows PC. Software included for Windows Smartphone. Supports ISO 9141, KWP2000. Supports SAE J1850. Supports CAN bus.Functions:Read diagnostic trouble codes, both universal and manufacturer-specific, and display their meaning (over 3000 universal code definitions in the database).Clear trouble codes and turn off the MIL ("Check Engine" light)Display current sensor data, including: Engine RPM, Calculated Load Value, Coolant Temperature, Fuel System Status, Vehicle Speed, Short Term Fuel Trim, Long Term Fuel Trim, Intake Manifold Pressure, Timing Advance, Intake Air Temperature, Air Flow Rate, Absolute Throttle Position, Oxygen sensor voltages/associated short term fuel trims, Fuel System status, Fuel Pressure, Many others...Supported OBD-II protocol:ISO15765-4 (CAN)ISO14230-4 (KWP2000)ISO9141-2J1850 VPWJ1850 PWMColour: blackMaterial: ABSPackage Contents:1 * KW912 Bluetooth tester1 * CD1 * English ManualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.