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Door Hanger with Door Knock Sensor by Serene Innovations

"Know when someone knocks at the door"

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)

Item#: 931058
Your Price : $55.00

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).

Related Products

931010 - CentralAlert Lamp Flasher - $31.95

931003 - Serene CentralAlert AX Audio Alarm Sensor - $45.95

931004 - Serene CentralAlert Baby Sound Sensor - $49.95

931009 - Serene CentralAlert Extra Wireless Doorbell - $31.95

931007 - Serene CentralAlert Motion Detector - $73.95

931002 - Serene CentralAlert RX Vibrating Remote Receiver - $74.95

931008 - Serene CentralAlert SOS Emergency Help Button - $31.95

931006 - Serene CentralAlert Storm Warning Alert - $45.95

Category: Serene
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