The Smoke/Fire and Carbon Monoxide Alarm Notification package with Alarm Clock Receiver and Bed Shaker from Bellman & Symfon is designed to keep you and your family safe day and night. The Smoke Alarm Transmitter is to detect heat and smoke at the earliest possible stages. The Carbon Monoxide Transmitter is to detect traces of carbon monoxide early, well before it reaches levels that could be dangerous to you. In such events, the transmitters will immediately send a radio signal wirelessly to the Alarm Clock Receiver, and you will be alerted with loud sounds, bright flashing lights, and strong vibrations from the bed shaker which will be sure to wake hard of hearing, deaf or heavy sleepers. From the Alarm Clock Receiver, you can quickly distinguish between the smoke/fire alarm and the carbon monoxide alarm with the colored LEDs (red for smoke/fire, red and orange quickly alternating lights for carbon monoxide). The backup batteries on the Alarm Clock Receiver can keep it fully functional even during a power outage. This Smoke/Fire and Carbon Monoxide Alarm Notification System package will especially help people with hearing loss stay safe and feel protected! This complete package has been certified according to standards UL217 / UL2034 / ULcS531 / CSA 6.19.