Serene Central Alert Door Announcer / Knocker
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Serene Central Alert Door Announcer / Knocker

Product Code: CA-DX

  • Optional accessory for the Sereonic Alert Wireless Notification System (CAQ-1002/CA-360QK), Central Alert Portable Remote Receiver (CA-RX) or the Central Alert Wearable Pager Receiver (CA-PX)
  • Wireless sensor that detects door knocking vibration or door chime vibration and sends information to one of the above systems to alert you 
  • Can also connect to existing doorbell, door chimes, or door intercom provided there is an external connection (has 2.5mm jack)
  • Requires (2) AA alkaline batteries (not included) 
  • Operating distance: up to 200 feet
  • Can be wired directly to doorbell terminals where the electrical signal activates CA-DX
  • Will not work when purchased alone; must be paired to either CA-360QKCAQ-1002, CA360, CA-380,CA-RX or CA-PX


  • (1) Wireless Door-Knock/Door Chime Sensor
  • (2) screws for mounting
  • (2) square pieces of double-sided 3-M sponge tape for alternative or additional mounting
Requires (2) AA alkaline batteries, not included in packaging

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