K2-1102SP-Z4SC-04 with Tactile Switches SMD RoHS is a surface-mount, single-pole, momentary switch manufactured by HRO parts. It is constructed of high-quality polyamide material, has four solder pins, and comes in a 4-pin footprint. The switch features a tactile feedback with an audible ‘click’ sound and has a RoHS (Restriction of Hazardous Substances) certification, which guarantees it being free from any hazardous materials and thus being environment-friendly. This switch is used generally for tactile feedback applications and ergonomic profile in applications such as cellular phones, electronic game consoles, consumer/commercial electronics, and medical products.