The SKRKAHE020 Tactile Switch manufactured by ALPS is a surface-mount device (SMD) featuring two SPST-NO (single pole single throw normally open) contacts. It has a 3.90mm by 2.90mm body size and a contact rating of 50mA @ 12VDC. It is compliant with RoHS directives, which indicates that harmful chemicals such as lead have been eliminated from its component materials.