Feature:1. The alarm function needs to be used with the host(not include host) and the flood alarm. When the immersion probe detects that the water level exceeds the standard, the alarm sounded immediately.2. The detection method is water detection. Oneclick opening mode. You can turn it on immediately when you need it, and turn it off when you don't need it.3. The sensitivity of the detector is sensitive, and the false alarm is 0. When the detector detects the overflow, it reacts as fast as 0.1 seconds and emits an audible alarm.4. It saves energy and electricity. Low energy consumption, standby for up to 1 year, no need to replace low batteries frequently. If the alarm time becomes shorter, please replace the battery in time(include battery).5. The detection line is Approx. 1m/39.4in, and the wireless transmission distance in the open area is Approx. 100 200m/109.4 218.7yd. The installation method is wallmounted.Specification:Item Type: Water Leak DetectorMaterial: ABSTransmission Frequency: 433 MHzWater Immersed Battery: 3V 1 x CR2450 battery (battery included)Detection Mode: Water sensing detectionInstallation: Wall hangingAmbient Humidity: 95%RHWorking Humidity: -10 - 60Detection Line: Approx.1m/39.4inWireless Transmission Distance: Approx. 100 - 200m/109.4 - 218.7yd(in the open space).Package List:1 x Water Leak Detector