This electronic part is a tactile switch manufactured by GANGYUAN. It has through-hole mounting, meaning it can be soldered to a circuit board, as opposed to surface-mounted components. It is also RoHS-compliant, or compliant with the Restrictions on Hazardous Substances directive, meaning that it has minimal levels of hazardous materials, including lead, cadmium, and mercury. This switch operates with a force-activated plunger, which when depressed, makes contact with the soldered-in circuit and completes the connection, essentially activating whatever the switch is connected to.