Cando OBD Aid Breakout Box (CDO-OBDA) Conduct a safety check on OBDII dlc port prior to connecting your scan tool or flashing ECU Constantly monitor the battery voltage with warning beeps in the event of weak battery condition Warning beep will alert you when the voltage falls below 12V or when it rises above 15.2V while programming or coding Provides a quick check on the alternator charging conditions by voltage monitoring With the data Saver cable (optional), you can prevent the loss of data in ECU memory and protect the ECU when disconnecting the old battery or connecting a new battery