WSS3-3W04 is an STI StopperSwitch® waterproof emergency push button featuring a green housing with a white button and key-to-reset operation. Designed for emergency signalling, isolation, shutdown, panic alarm, evacuation, and other critical control functions, it provides a durable weather-resistant solution for both indoor and outdoor applications. The unit incorporates a multi-function signal switch (DPC & SPC), heavy-duty terminals, and a robust UV-stabilised polycarbonate enclosure for reliable performance in demanding environments.