A hygrometer measures the humidity in a living room, bedroom or other room. Our hygrometers display not only the humidity but also the temperature in a room. A hygrometer can be combined with all our smart bulbs and plugs. In the Smart me app, pair a hygrometer to one of our smart plugs and turn a humidifier up or down automatically when a certain value is reached. PLEASE NOTE: A Smart me Zigbee hygrometer only works in combination with a Zigbee gateway (Link ME). Connect multiple Smart me Zigbee products to one gateway.