Overview: The water instruction sensor can work with Sonoff RF Bridge 433, alarm system, etc. When detecting water overflow, alarm notification message will be immediately sent to the APP.? Features: *Can be equipped with wireless host. Installation by double-side adhesive, easier and convenient to install. *433MHz frequency, wireless transmission is more than or equal to 200 meters in open place. *When the two feet of the detector was immersed by the water, it will give flash and send alarm message to the alarm host.? *Excellent design, tiny and fashion. Low-consumption design, which can make it work long time. *Ideal water intrusion warning for homes, apartments(kitchen, toilet), warehouses, offices, laboratory, hotel rooms, garages, etc. Specifications: Type: Water Level Alarm Frequency: 433MHz Emission protocol: 1527 Working Voltage: DC 12V Battery Type: 12V 23A(not included) Standby Current: less than5uA Alarm Current: less than10mA Transmission Distance: more than200m(in the open area) Working environment temperature: -10celsius~60celsius Operation humidity: less than80% Item Size: Approx. 7.8 * 3.7 * 2cm (L*W*H) Item Weight: Approx. 38g / 1.3oz Package Information: Package Size: Approx. 9.3 * 5.6 * 3cm/ 3.7 * 2.2 * 1.2in Package Weight: Approx. 46g / 1.6oz? ? ? ? ? ? ? ? ? Package List: 1* Water Instruction Sensor 1* Mounting Sticker?