Elgato Eve Room Wireless (1st Generation) - Indoor Sensor with Apple HomeKit Technology, Bluetooth Low Energy Know your home: Eve Room senses indoor air quality, temperature, and humidity Improve your comfort: sophisticated sensor analyzing volatile organic compounds (VOC) Gain insights: your personal data by day, month or year HomeKit-enabled: unparalleled ease of use and advanced security Works with Siri: ask for temperature and humidity Truly wireless: powered by long-lasting, replaceable batteries Easy setup: direct connection using Bluetooth Smart technology, no hub or gateway required