We special design and sell PC-based ELM327 V1.1 scan xxxxx supports all OBD-II protocols. OBD-II Protocols: ISO15765-4 (CAN) ISO14230-4 (KWP2000) ISO9141-2 J1850 VPW J1850 PWM Output protocol: RS232 Baud rate: 38400 or 9600 Indicator LEDs: OBD Tx/Rx, RS232 Tx/Rx, Power Operating voltage: 12V, internal protection from short circuits/overvoltages Nominal idle current: 45 mA OBD-II Software for ELM327 is a free program that allows you to use your PC and a hardware interface to get the information from your car&＃039;s computer. Unit Price (FOB Changsha): USD 60/pc (serial port) USD 70/pc (USB port) USD 110/pc (bluetooth)