Medallion Series Shake-Up Receiver with Vibrator (SU5001-MC) Transmitter It operates on two AA

It operates on two AA batteries

Receive notification of incoming phone calls from family members

Senses smoke with a photocell detector

The Signature Series Telephone/TTY/VCO Transmitter alerts you to voice

Attaches to the latest digital doorbell systems

Medallion Series Shake-Up Receiver with Vibrator (SU5001-MC) Transmitter It operates on two AAShake up to an alert to smoke, fire or carbon monoxide when sleeping with your hearing aid removed. The Medallion Series Shake Up Receiver with Vibrator works with single or multiple Medallion Series smoke, fire transmitters or carbon monoxide detectors. When a transmitter signals a warning, the receiver activates a bed vibrator to awaken you and alert you to the potential danger. Position the bed vibrator between your mattress and box spring and