Wireless Mini Glass Break Detector For Alarm System And, Zigbee Connection. Product Features ??NOTES?An Aqara Hub is required and sold separately. Requires a secured 2. 4 gigahertz WiFi network connection. The Aqara M2 or M1S Hub can connect up to 128 devices(*use of a repeater such as the Aqara Smart Plug or Aqara Smart Wall Switch(With Neutral) is required). ?VIBRATION DETECTION?Whenever the Aqara Vibration Sensor detects unexpected vibration, it will send alerts to your phone or activate the local alarm on the Aqara Hub. ?VERSATILE MOVEMENT DETECTOR?The Aqara Vibration Sensor can also detect tilt and drop movements when it is attached to an object. Therefore, you can attach the sensor to your valuables or drawers and be notified if any movement is detected from the device. ?HOME AUTOMATION?The Aqara Vibration sensor can be made to control and trigger other Aqara connected devices when vibration and or movement is detected. ?EASY INSTALLATION?No wiring or screws required. In addition, If you have any questions, please feel free to contact us. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!