Serene CentralAlert CA-DX Door Knocker Sensor

This is not a standalone unit.

Install device on existing door chime or intercom door announcer for vibration detection.

Can use up to 4 transmitters (CA2004)

ID: CA-DX or CA2004

This product requires:

Serene CentralAlert CA-360 Notification System

or

Serene CentralAlert CA-RX Remote Receiver

This product works with:

Serene CentralAlert CA-360 Notification System

Serene CentralAlert CA-RX Remote Receiver

Serene CentralAlert CA-PX Pager for Notifications