This is a SPST-NO, 12.00mm x 12.00mm, 13.00mm, 50mA @ 12VDC, 10*10*13mm, RoHS compliant tactile switch manufactured by HRO Parts and is identified by the part number K2-1844DP-S4SW-02. It is a switch that is actuated by an external force, such as a finger press, and is designed to detect physical parameters such as position, direction, and pressure. It has a power rating of 50mA @ 12VDC and a dimension of 10*10*13mm. It is RoHS compliant and rated for long life performance.