The B3SL series from Omron are surface mount sealed tactile switches. These switches are typically used in office equipment, communications equipment and TVs.
SPST-NO contact configuration
Switching capacity of 1 to 50mA at 5VDC to 12VDC
Maximum contact resistance of 100mohm
Minimum insulation resistance of 100Mohm
Sealed construction conforming to IP67
Crisp click feeling and middle stroke with rubber plunger