Aqara Vibration Sensor: Compatible With Apple Homekit, Works With Ifttt, Product Details ??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. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.