2pcs LED Strip Light Inline On/Off Switch Cable DC Jack Switch 5.5mm x 2.1mm Male Female DC Barrel Connector LED Tape Switch, 12V Inline Rocker Switch, DC 5V-24V LED Strip Switch, White. It uses a standard 5.5mm x 2.1mm DC barrel plugs to fit in between your 12V DC power source and an LED Light Strip with no cutting or wiring needed!