SKU 931058
Manufacturer Serene Innovations
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Door Hanger with Door Knock Sensor

Know When Someone Knocks at the Door

Our Price: $59.95
Availability: Usually ships within 1 to 2 business days
  • Detects vibrations from door knocks & 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)
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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