Explore Scientific Wireless Temperature Sensor is a three channel thermo sensor to be used as an additional or replacement remote sensor with compatible weather stations, thermometers and clocks. The wireless sensor has a water-resistant casing and can be either set on a desktop or mount on a wall. Collects temperature 3 selectable channels Can be used indoors or outdoors Temperature range: -20°C to 60°C (-4°F to 140°F) Transmission range: 30m (98ft) Water-resistant case Wall-mount option Requires 2x AAA batteries (Not Included) Compatible with Explore Scientific product - RPW3008