SERENE CA-DX CentralAlert Door-Bell Knocker/Sensor

SERENE CA-DX 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 CA-360 to alert you Simple to install with adjustable sensitivity to avoid falsealarms 2.5mm Jack for direct connection to your existing doorbell/door chime Advanced Technology: 2.4 Ghz Smart-Code 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 +30°C SICADX Features: Accessories : Yes Additional Sensors and Alarms : Yes Dimensions (LxWxH) : 3 x 1 x 5 Weight : 0.2 lb. Energy Star Qualified : No Country of Origin : China (provided by manufacturer, not verified) RoHS Compliant : No Type of Packaging : Retail Box Warranty : 1 Year

Price: 41.12 from The Twister Group US Canada