Aqara Water Leak Sensor, Needs Aqara Hub, Wireless Water Leak, 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). ?FLOOD DETECTION?Whenever the Aqara Water Leak Sensor detects water, it can send an alert to your phone and activate the local alarm on the Aqara Hub to prevent leaks and flooding. ?HOME AUTOMATION?Controls and triggers Aqara connected devices when excess water is detected. ?WIRELESS SENSITIVE?No wiring or screws are required. The ultra mini design allows you to put it anywhere that dripping and leaking could happen. Our water leak sensor is designed with sensitive leak probes which the threshold of the water level is 0.5mm. ?INDUSTRY-LEADING QUALITY?Durable IP67 water-proof housing with rust-proof exterior coating. 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.