This is a pair of Dr. Dre headphones from a lot that was from a store display. They do not produce sound when plugged into a 3.5mm jack. The hook-up does have a spot for another type of power which I do not have. These may work as they were a display model and other headphones in this lot did work when plugged into a system. 

The battery compartment does not look complete as it does not have any metal power connectors. The cover also appears to have been glued on the phones. 

This is for parts or repair and can not be returned.