Aazon.co: CTOOL OBD2 Breakout Box with Universal Wire Jupers 16Pin OBDII Protocol Detector... 1.[Detect Communication Protocol, Power Supply and Grounding Circuit]This is a professional automotive tool for the OBDII diagnostic link connector which offers easy access to the OBDIl connector for monitoring signals of protocol, power and grounds conveniently and safely OBD2 Diagnostic Tool Aazon.co: PRIZO OBDII OBD2 Breakout Box Car Break Out Box Car Protocol Detector Auto Can Test Box Starter 【Standard 4MM Rubber Socket】The OBD2 breakout box uses safe banana sockets, and the built-in input jack can be connected to any type of 4mm banana plug, including those with safety sheaths, making it easier to connect the breakout box to a multimeter or oscilloscope. Yellow LED (Pin 2/6/7/10/14/15) lights up to show communication with a scan tool and protocol identification; Green LED (Pin 4/5) lights up to indicate good ground. The Red LED (Pin 16) lights up to show there is power. 【LED Indicators】The LED lights on the OBD2 breakout box can quickly indicate whether the power and grounding of the OBDII interface on the car are normal. The cable body is made of elastic thermoplastic TPU material, which has the characteristics of the high elasticity, high strength and high resilience. Protocol Detector & Break Out Box OBD2 CAN Data Link Signal Diagnostic Tool 【16 Pin OBD Interface】The input jack layout simulates the 16-pin layout of the OBDII interface, making more tests quick and intuitive. 【90CM Extension Cord】The OBDII connector extension cable adopts multithreading data connection technology, which makes the connection faster and smoother.