It’s a 6A 250V AC SPST ON-OFF Round Rocker Switch. This is a simple On/Off SPST Rocker Switch. There are no screws needed; it simply clips into place. This is a simple two-pin switch; simply cut one of the two power wires and solder each end to the unit. This 6A 250V AC On-Off Rocker Switch is ideal for controlling power to electronic circuits, robots, and other similar devices. It is the best On/Off Rocker Switch with a high load rating and the ideal size for all general-purpose On/Off applications. SPECIFICATION Rating 6A/250V AC Switch Mode ON-OFF Switch Type: Rocker Switch, SPST Number of Pins: 2 Outer Diameter 23mm Height 29mm Mounting Whole Diameter 20mm Pon Pitch 7.8mm Country of Origin China