Working PrincipleWhen water leakage occurs, the device will wake up the Wi-Fi connection to the Wi-Fi router, send an alarm signal to your mobile phone via Wi-Fi network. The alarm can be selected as notification on your mobile phone with bar display, streamer with tone, vibration based on the APP notification setting on your mobile phone. 5 Seconds Delay & CompatibilityThere is about a 5 second delay between status changes and notification on your mobile phone depending on the internet connection quality. The device works as a scene to trigger another action of the compatible device in the same APP such as to turn on/off the socket and bulb. High Performance Support Wi-Fi (Smart Config) and AP (Access Point) mode for wireless connection Support battery level detection and low battery display. Easy to install and use: Wall-mounted installation and extended detection cable up to 90 cm. With LED indicates working status Protect your home and valuables from annoying leaks and dangerous flooding Easy installation and use, suitable for home, office, etc. Specification: Condition: 100% Brand New Material: ABS Plastic Color: White Power Supply: 2 * AAA Batteries, 3V Radio Frequency: 2.4GHz - 2.484GHz Radio Protocol: IEEE802.11b/g/n Transmitting Power: 802.11b: 17dBmz 2dBm @ 1Mbps 802.11g: 15dBmz 2dBm @ 54Mbps 802.11n: 13dBmz 2dBm @ MCS7_HT20 Receiving Sensitivity: 802.11b: -91dBmz @ 11Mbps 8% PER 802.11g: -75dBmz @ 54Mbps 10% PER 802.11n: -72dBmz @ MCS7_HT20 10% PER Vector Error EVM: 802.11b: 35% 802.11g: -28dBm max 802.11n: -28dBm max. @ MCS7_HT20 Operating Temperature: -10 ~ + 40 Storage Temperature: -20 ~ + 60 Relative Humidity: 8% ~ 80% Package List: 1 * Installation Kit Note: Other items are not included, the color is based on the first picture, and other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thank you!becomeveryrich