ZNU OBD2 VAG-COM 409.1 KKL Check Engine ECU OBD2 Cable Scanner Scan Tool VAG-COM for VW/AUDI This diagnostic cable is used only for ISO9141 and KWP2000 transmission protocols Software Compatibility: Windows 98SE / ME / 2000 / NT and XP Windows 7 This cable may not work if your car uses a protocol / bus system like VPW, PWM or CAN-BUS No DC or alternate power supply needed, just connect to your car and computer