ER1226W Model: ELM327 Reads diagnostic trouble codes including generic codes， pending codes and manufacturer specific codes (the database contains over 3000 generic code definitions) Clears trouble codes and turn off the MIL (“Check Engine” light) Displays 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 voltage/associated short term fuel trims， fuel system status， fuel pressure， etc Supported OBD-II protocol: ISO15765-4 (CAN)， ISO14230-4 (KWP2000)， ISO9141-2， J1850 VPW， J1850 PWM Output interface protocol: RS232 serial port Baud Rate: 9600 or 38400 Led indicator: OBD output/ input (Tx/Rx)， RS232 output/input (Tx/Rx) Voltage: 12V Built-in short-circuit protection and over-voltage protection General Current: 45 mA Helps you save time and money on repairs Can help to identify problems with a used vehicle before buying or selling Compact size for ease of use