WL-SR-WCAQD-01 SR Wireless Ceiling air quality detectors IOT wireless ceiling air quality detectors, using ZigBee / SmartRoom wireless technology for detecting environmental temperature and humidity as well as the concentration of certain gases in the atmosphere, such as carbon dioxide, and other harmful gases, and the signal wirelessly to mobile intelligent terminals, to alert the user to achieve environmental control operations can also be self-linkage associated sensors, to open or close the doors and windows, air conditioners, humidifiers, etc. for users to create a good living environment. This product because of its high performance and high reliability, can be widely used in smart home, smart hospitals, buildings wisdom, wisdom farming, agriculture wisdom, wisdom, hotels and other places. Product description: Support ZigBee / SmartRoom HA protocol; ZigBee Device Type: Repeater; anti-jamming; patented design; reliable, stable performance, data accuracy. Specifications: communications IEEE802.15.4 (ZigBee / SmartRoom) communication distance 100m (under visual conditions) Power Requirements 110 ~ 250V Operating temperature -10 ℃ ~ + 55 ℃