Function To monitor the indoor and outdoor climate With internal sensor and three wireless transmitters for monitoring the temperature and humidity in up to four rooms Maximum and minimum values, display of tendencies, comfort zone Radio-controlled clock with date Product information for download: Technical data Delivery contents Base station, 3 x thermo-hygro transmitters, instructions manual Measuring range temperature outdoor -40…+60°C (-40…+140°F) Maximum range 80 m Maximum amount of transmitters 3 Sender im Lieferumfang 30.3221.02 Transmission frequency 433 MHz Measuring range temperature indoor 0…+50°C (+32…+122°F) Measuring range humidity indoor 1%...99% Material Plastic Assembling Free-standing Power consumption Batteries Batteries 2 x AA 1.5 V (Base station), 2 x AA 1.5 V (per transmitter) Dimensions (L) 157 x (B) 42 x (H) 120 mm Weight 216 g