Usage Tips:REAL-TIME ALERTS, FREE APP NOTIFICATION: If the water sensor detects leaking water or the preset limit overrun,you smartphone will receive an alarm message by the Tuya APP within a few seconds. Whether you are in the office or on the road, you can check the status via APP at any time. You can also share this with others, and more people can receive alerts and track the progress of wireless sensor activity. USE Wi-Fi,EASY TO INSTALLL: No gateways and complicated required, you can connect our water sensor to your home Wi-Fi in just a few simple steps (2.4G Wi-Fi only). You can use adhesive taps to install; just place the water leak detector near or under the equipment you wish to monitor. WIDE APPLICATION:The water monitor detector can be used in sump pumps, toilets, , laundry machines, dishwashers, sinks, fish tanks and any other location subject to water leaks and flooding.The smart wifi water leak sensor can also be used to monitor the preset limit of water level in bathtub, pool and other scenarios. LOW-POWER MEANS LONGER BATTERY LIFE(NOT INCLUDED BATTERIES): Wireless water sensor is supplied power by 2*AAA batteries micro, working time can year without to replace the battery. When the battery is running low, the APP interface will remind you to replace batteries. ps:After the water recedes, an alarm release message will be issued synchronously. Power Source:Battery Powered Compatible Devices:Smartphone Number of Batteries:2 AAA batteries required.(Need to buy it yourself) Control :App, Touch Colour:White Material:ABS Package Contents: 1 x Water Immersion Sensor 1 x double-sided tape 1 x card pin 1 x English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.