1Function: This is an automotive tool for the Obdii diagnostic link connector which offers easy access to the Obdii connector for monitoring signals of protocol, power and grounds. 2High Compatibility: Diagnostic protocol detector can be also connected to multi meter for further testing once unconfirmed signals detected. 3Banana Socket: OBD2 breakout box adopts safety banana sockets design, which accepts all types of 4mm banana plugs including those with safety sheaths. 416 Pin Interface: When the scan tool communicates with the vehicle, each of the 16 pins can be easily accessed. It is no longer necessary to detect on the Obdii connector. 5LED Indication: With LED indicator design, you can quickly indicate power or ground problems of Obdii connector. Mimics the Obdii connector layout for quick reference.