This terminal screw down two conductor connector to BNC is a very useful product for CCTV security cabling connection and etc.. projects. No electrical tap, No splicing, no crimping, but only a small screw driver. Features: The terminal connector with mark polarity No More Cutting and soldering! Connector A : 1 X Barrel Screw Down for "+" & "-" B : 1 X BNC Male Package Content (in 1 packet) : 2 X Products in 1 packet