The OBDII Pass-Through Splitter allows two products to be simultaneously plugged into the OBDII port such as an Edge monitor unit, and another product, including, but not limited to, power running boards or other potential OBDII powered products. This new OBDII splitter is fully populated with a 16-pin pass-through, pinned connector. Products may vary on what can be running at the same time. Not recommend being used with two monitors or tuners plugged in at the same time.