The Shelly Flood can work seamlessly in conjunction with other Shelly devices such as the Shelly Plus 1 to automate flood protection of any liquid in your home or office, cutting the power supply of sockets that could be exposed to water damage, or even cutting the water supply entirely temporarily to prevent any water damage. As well as automatically detecting floods, the Shelly Flood will also send real-time instant updates, and is wire-free so can be placed anywhere in the space where flooding may occur. The Shelly Flood can live up to 18 months on a single battery and also features a built-in temperature sensor, making it a great addition to any automated heating systems when used in conjunction with the Shelly Plus 1 as it can detect when temperatures drop below a certain level and trigger the heating. Please note this product does not come with a battery and requires a 3V CR123A. Twist the top cover of the device anti clockwise to open.