The R2819DS55F16S20 is a tactile switch manufactured by ROSWIN. It is an single-piece pushbutton switch that is surface mountable and RoHS compliant. The switch has a 0.85mm actuator travel, a 4.5N operating force, and 6.7x6.7mm mounting size. It is designed for use in a wide range of electronics, including consumer electronics, computer, automation, medical, automotive, military, and industrial applications.