Its 3 Pin 2.54mm Pitch 8.5x3.8x6mm Mini SPDT Slide Switch, A SPDT (Single Pole Double Throw) slide switch is an electrical switch that provides three terminals or positions. It is commonly used in electronic circuits to control the flow of current between two different paths. The switch is operated by sliding a lever or actuator to change its position. Sliding the lever to one side activates one throw, while sliding it to the other side activates the other throw. SPDT slide switches are widely used in various electronic devices and circuits, such as audio equipment, power supplies, lighting controls, and hobbyist projects. They provide a convenient way to switch between two different paths, allowing for control and customization of circuit functions.