The SF117-series Emergency Call Switch is available in two models and features a rugged, long-life, positive-acting switch mounted on a durable flame-retardant (UL® 94V-0) plastic panel. Signaling an emergency requires just a short pull in any direction on the 6? long nylon cord. The signal cannot be canceled except at the point of origin. The SF117/2C provides two circuits to operate a separate visual and audible signal. The SF117/4C provides two additional circuits that may be used to operate additional signaling devices as needed.