Wi-Fi Enabled X-Sense Smart Water Leak Detector, A Single-Pack Accessory, Pack). Product Details Note: The alarm cannot be directly added to the app and a base station is required Expand Your Smart Home Your Way: The SWS51 is an accessory for SWS54 water detector kit (compatible with FS31 smoke alarm kit); long transmission distance of 1,700 ft (500 m); simply press the test/silence/pair button to connect the sensor to the base station and add up to 50 devices Real-Time Notifications: When a water leak is detected, a push alert will be sent to your phone, so you?ll be alerted quickly even while you are not at home; you can share the device with your family members so they can also check the device status anytime, anywhere (Note: The SWS51 water leak sensor needs to be paired with the X-Sense SBS50 base station to be used.) Know from Anywhere: Once triggered, the water leak sensor and base station will sound simultaneously at a volume of up to 110 dB ? loud enough for everybody to hear; simply mute the alarm via the app or push the silence button on the base station or water leak sensor High Sensitivity: The SWS51 water leak detector is equipped with 2 top sensor probes and 4 bottom sensor probes to detect water leaks and floods; provides an early warning of water damage and is ideal for kitchens, bathrooms, basements, and more Wire-Free and Sleek Design: No wiring or setup required; only measuring 1" (29 mm) in diameter, this water leak sensor is small and compact enough to fit anywhere and nicely blends into any home decoration; has a 5-year lifespan with 3-year replaceable batteries (included) 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.