OBD2 Y-Splitter. Perfect for allowing two devices to plug into the diagnostic port at once. Ultra low-profile connector ensures you won't accidentally bump it with your knee.  Ribbon cable is durable and allows for the connectors to be tucked out of the way.

Commonly used to access the CANbus for use with a Control Module while still allowing logging and editing using HP Tuners or other OBD2 device.