- Centralalert Door-bell Knocker/sensor
- Detects The Vibration Of Your Existing Door Bell Door Chimes Door Intercom Announcer Or The Knocking On Your Door It Then Sends A Signal To Trigger The Ca360 To Alert You
- Simple To Install With Adjustable Sensitivity To Avoid False Alarms
- 2.5mm Jack For Direct Connection To Your Existing Doorbell/door Chime
- Advanced Technology: 2.4 Ghz Smartcode
- Operating Range: Up To 200ft Open Space Actual Distance Varies According To House Construction
- Battery Type: Two Aa Size Alkaline
- Battery Life: Up To 10 Months
- Operating Temperature: + 10 To +30c
- Brand: Serene Innovations
