The wireless thermometer probe sensor. Data can be received by our consoles(sold separately): HP2551/HP2553, GW1100, WN1900, HP3500/HP3501, WH2910, and posting data to https://www.ecowitt.net. 3M/10FT cabled waterproof probe sensor and can be used to measure temperature in liquids( mainly water) or even bury it in soil or place the sensor into spaces like a fridge etc. The sensor works at one of the 8 channels selected via dip switches. It can work by itself by showing current temperature on its own LCD, but also the data is transmitted under ISM bands and the signal can be received by our different consoles or gateways, which streams the sensor data to www.ecowitt.net. When paired with a GW1100 Wi-Fi Gateway: The View temperature reading on the Live Data page of the WS View app (requires the 6 gateway and your phone are using the same Wi-Fi network) Up to 8 channels supported. Channel names can be edited on the app. Battery level information displayed on the WS View App when low battery power detected When paired with a Weather Station Console(HP2551/HP3500/HP3501): View water temperature data in real-time on the Display. Up to 8 channels supported. Channel names can be edited on the console(only for The HP2551/HP2553 console). When paired with a weather station console ( WH2910 with console software version V2.1.8 or above). Sensor data can’t be displayed on the console but is being pushed to https://www.ecowitt.net for remote data hosting.