Rocker switch also known as ship-shaped switch, seesaw switch, IO switch, power switch, its structure and button switch is the same, but the KNOB into a boat-shaped. Boat-shaped switches are often used as power switches for electronic equipment. Their contacts are divided into single-pole single-throw and double-pole double-throw, and some switches are also equipped with indicator lights. Seesaw switches are used in water dispensers, treadmills, computer speakers, battery cars, motorcycles, ion televisions, coffee pots, slot machines, massage machines, etc. . Each seesaw switch should not control more than 4 lamps (its purpose is to reduce the power consumption index) . In the control mode, it can be divided into groups without separate light control, separate single light control and separate double light control, two single control, two double control, three single control, three double control and so on.