Processor: ELM327 OBD-II Protocols: ISO15765-4 (CAN) ISO14230-4 (KWP2000) ISO9141-2 J1850 VPW J1850 PWM Output protocol: RS232 Baud rate: 9600 or 38400 Indicator LEDs: OBD Tx/Rx, RS232 Tx/Rx, Power Operating voltage: 12V, internal protection from short circuits/overvoltages Nominal idle current: 45 mA Dimensions: 3.75" x 1.7" (95 mm x 43 mm)