Self-locking switch: simple structure, good spring recovery, press the button to turn on and off, easy to use. Dimension: 18 x 12 x 10mm / 0.71 x 0.47 x 0.39" (L*W*H) (pins not included). Terminal: 2 pins; Model: KAN-28, Rated Voltage: DC 30V, Rated Current: 1.5A, Contact Resistance: 100M ohm max, Insulation Resistance: 100M ohm min, Withstand Voltage: AC 500V/1min. Working Principle: A pushbutton switch is a switch that uses a button to push the transmission mechanism to turn on or off a moving contact with a static contact and switch the circuit. Application: Locking pushbutton switch, widely used in household appliances, electric flashlights, flashlights, or electronic DIY projects. In the electric automatic control circuit, it is used to manually send the control signal to control the contactor, relay, electromagnetic starter motor, etc. Package Contents: 40 pcs x Pushbutton Switch (20 pcs Flat Pin with Hole + 20 pcs Bent Pin with Hole).