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-360QK, CAQ-1002, CA360, CA-380,CA-RX or CA-PX