The 242 Hearing Impaired Kit features a 41216 120V AC Smoke Alarm 499 Firex Relay Module GXS-120-177 strobe light (177 candela) and a wiring instruction sheet. The 41216 Smoke Alarm has an 85 decibel horn test switch and a lighted power-alarm LED indicator- the LED flashes once per minute to confirm AC power. When in alarm the LED (41216 Smoke Alarm) flashes rapidly once per second. The GXS strobe light utilizes a Xenon flash tube which generates a high-intensity light visible from all sides of the lens. The GXS Remote Strobe is intended to provide a visible notification signal for the purpose of life safety and property protection. The 242 Hearing Impaired Kit is ideal for hotels apartments hospitals rest homes or whenever visible alarms are required.