Medallion™ Series Smoke Detector with Transmitter, SD4-MC (US) Weather Alerting you clip it to your

you clip it to your belt or waistband

Wired to your existing doorbell

Operates with million-code technology

Operates on 9-volt battery

Medallion™ Series Smoke Detector with Transmitter, SD4-MC (US) Weather Alerting you clip it to yourModel SD4 MC Where there's smoke, there's the potential for danger. Become aware of it and the potential for fire with the Medallion Series Smoke Detector with Transmitter. When the photocell detector senses the presence of smoke, the built in transmitter broadcasts a signal to any Medallion Series Mini Receiver. Easy to install in any room, it is powered by a long life, 3 volt lithium battery for round the clock, 24 hour protection. Documentation