![CentralAlert Door Knock Sensor Model CA-DX](http://adcohearing.com/cdn/shop/products/6549_700x700.jpg?v=1666896773)
CentralAlert Door Knock Sensor Model CA-DX
Install device on existing door chime or intercom door announcer for vibration detection. When someone rings your door bell, it detects vibration and sends a wireless signal to trigger the CA-360 to alert. Or, you can attach the CA-DX to the inside surface of your door to detect the knocking on your door.
Product Features:
- Detects vibration form existing doorbell or door chime and sends signal to CA-360 when someone is at the door
- Attach to or place near existing doorbell or door intercom
- 2.5mm jack for direct connection to doorbell terminal
- Optional door-knob hanger for hotel kit
- Sensitivity adjustment
![](http://adcohearing.com/cdn/shop/files/Delivery_Truck_XS_50x50.png?v=1666365901)
Ships FREE today
All in-stock orders placed before 5pm EST (Mon-Fri) will ship the same day. Ground shipping is FREE within the 48 contiguous United States for all orders over $9.95. Expedited shipping options, as well as ground shipping to Alaska, Hawaii, or Puerto Rico are available for an extra charge.
Returns & Exchanges
Qualifying products may be returned within 30 days from receipt for a full refund. Please note that hearing aid accessories, hygine items and ear care products cannot be returned. Please CLICK HERE to review our full returns policy.