It is a 2-in-1 branch adaptor.  It is perfect for combining two small size solar panels together, providing a quick and easy parallel wiring solution for solar panels.  The small panels are like 10w or 30w.

- One end has Two SAE connectors.  They are hooked to two panels with the SAE connectors by one to one.

- The other end is one SAE connector that provides combined output from two solar panels. 

- Its length is 11 feet.