Things sensing doorbell button, based on ZigBee / SmartRoom protocol designed, visitor, press the wireless doorbell button, regardless of where the main person, can receive messages via mobile intelligent terminal. This product can be widely used in household wisdom, smart hotels, intelligent buildings and other places. 1, support ZigBee / SmartRoom agreement; 2, stylish appearance, touch more ergonomic design; 3, easy to install, easy to operate; 4, intelligent human design, for use in special populations. Communications IEEE802.15.4 (ZigBee / SmartRoom) communication distance 100m (under visual conditions) CR2450 3V battery power needs an operating temperature of -10 ℃ ~ + 55 ℃ net weight Weight No arguments No arguments color no parameters