4″ Backwater Valve Flapper Wi-Fi Water Alarm offers reliable performance helping keep your property safe by alerting you to potential sewer backups before it causes serious damage. Battery-powered with low energy consumption it can operate in standby mode for over 12 months. The sensor requires little effort to install and is very easy to use. Made durable Cyclone water alarms are compact in size and can easily be installed in any desired location. Plug and play with Tuya smart app Cyclone water Sensor requires no hub or subscription service. Designed to connect to your Wi-Fi network simply download the Tuya smart App on Apple Store or Google Play. From the app you will receive instant push notifications of any water backup. It also lets you keep an eye on the battery level of the device to ensure the water sensor never runs out of power. Satisfaction is guaranteed if any of our products fail to meet your expectations we will replace it free of charge. Note: Water Sensor only supports Wi-Fi 2.4GHz.