Mi|Home Smart Radiator Valve 2 Pack- Control Radiators to Regulate Heating in the Room- Set Different Temperatures in Different Rooms using Zonal Heating- Save Money and Energy using Zonal Heating- Using Timers to Set Certain Temperatures at Certain Times During the Day- Compatible with IFTTT Features Remotely operated Yes Multi-Zone capability Yes Suitable for indoor use Yes Wireless range 25 m Operating frequency 434.3 MHz Wireless connection Yes Storage temperature (T-T) -20 - 60 °C Operating temperature (T-T) 5 - 40 °C Temperature control range 0 - 30 °C International Protection (IP) code IP20 Product colour White Power Battery voltage 1.5 V Number of batteries supported 2 Battery type AA Batteries required Yes Weight & dimensions Weight 230 g Height 120 mm Depth 45 mm Width 45 mm manual pdf manual pdf