Door Hanger with Door Knock Sensor by Serene Innovations

"Know when someone knocks at the door"

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Product Features

Detects vibrations from door knocks and signals receiver
Requires Central Alert receiver (not included)
Easy to use— just hang it on the door knob/handle
Ideal for use in hotel rooms and bedrooms
Uses two AA alkaline batteries (not included)

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Item#: 931058
Your Price : $55.00

Availability:
Usually ships within 1-2 business days

Safe & Easy Shopping

Get an instant alert when someone knocks on the door with this alerting device! Simply hang this door-hanging door knocker transmitter on a doorknob and it will detect vibrations from knocks on the door and send a wireless signal to your existing receiver system (not included).

This alerting system is safe, secure, and discreet— since you hang it on the doorknob/handle inside the room, there is no visible part outside the door. Ideal for ensuring privacy in hotel rooms or bedrooms.

IMPORTANT NOTE: This is a transmitter only; it requires you to have a receiver (not included). Compatible with Serene CA360 CentralAlert Wireless Notification System (item 931001) and Serene CentralAlert RX Vibrating Remote Receiver (item 931002).

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