VAPKER 2.1x5.5mm Male DC Power Plug to 9V Battery Button Connector Cable Clips(10 pieces packed) Plug Type: 2.1 x 5.5mm Male to 9V Battery Clip Material(External) : Plastic;Color : Black, Red Great to use for LED strip light or arduino Package contains 10 pcs 9v Battery Clips (9V battery is not included)