Features: It can work alone, support local alarm or be equipped with a wireless host. Installation with double-sided tape, easier and more convenient to install. 433MHz frequency, wireless transmission is greater than or equal to 100 meters in open place. When both feet of the detector have been immersed in water, it will flash with 85 db alarm sound and send an alarm message to the alarm host. Excellent design, small and modern. Low energy consumption, which allows it to work for a long time. Ideal water intrusion alarm for homes, apartments (kitchen, toilet), warehouses, offices, laboratories, hotel rooms, garages, etc. Features: Type: Water Level Alarm Frequency: 433MHz Output Protocol: 1527< br/> Operating voltage: DC 3V Battery type: 2 * AAA 1.5V (not included) Static current: 20uA Alarm current: 40mA Transmission distance: 100m (in open area) Response time: 10s Unit cable length: 110cm Audible alarm: 85 dB Working Temperature: -10 ~ 60 Operating Humidity: &lt;80% Item Size: Approx 9.7*4.5*2 .3cm/3.81*1.77*0.90in Item Weight: About 74g/2.6oz Package Size: About 10*4.8*4cm/4 *1.9*1.6in Package weight: about 87g/3.1oz Package list: 1*Water Instruction Sensor 1* Mounting Sticker 1 * User Manual (English)