This product can be hung on the wall or placed on the table RF transmission frequency 433.92 MHz 60m transmission range in open area This product is used for outdoor temperature measurement and has good water resistance Batteries: 2 x AA (batteries are not included in the package) Outdoor temperature sensor with built-in wireless sensor can work 60 meters in open space. Long wireless transmission distance brings you great convenience to install and use. Outdoor temperature sensor with good waterproof function is very suitable for outdoor working environment.< /p> The outdoor temperature sensor is small and light and does not take up too much space for installation. The outdoor temperature sensor with bracket and hanging holes on the back can be easily installed on the wall or placed on the table. The outdoor temperature sensor is battery powered, has no power cord restrictions, and is easy to install. The outdoor temperature sensor with 433.92 MHz frequency is designed for the Fanju weather station. Up to three outdoor temperature sensors can be connected to a weather station. &#34; Colour: neutral white