This 18″ (45 cm) harness has an inline on/off switch, with a 0.1″ 3-pin female connector on one end and both a male and a female connector on the other. This 3-wire harness can be used to add a toggle switch between any two devices that can be connected with JR style servo connectors. One side of the switch has a lead with a female connector, while the other side has two leads, one male and one female.