Signature Series Sound Monitor 418 MHz Transmitter (SM5-SS) Accessories With its simple pin jack

With its simple pin jack

Easy to install and powered by the doorbell’s electrical circuit

night stand or other flat surface

Assure yourself of power in case of an electrical failure with the Backup Battery Pack

Easy to install and connects in seconds

Signature Series Sound Monitor 418 MHz Transmitter (SM5-SS) Accessories With its simple pin jackAlert yourself to a babys cry, door buzzer, alarm clock or oven timer. Whatever the noise, the Signature Series Sound Monitor Transmitter will notify you of it. When a sound is detected, it broadcasts a signal to any Silent Call Signature Series Receiver. A delay circuit prevents activation by brief noises such as a slamming door, and a sensitivity control lets you adjust the sound threshold at which it activates. Fully portable, it operates on two AA