Feature: 164ft Remote Working Range – Wirless transmission range up to 164ft(50m) which enables it use in most areas such as basements, outdoor porch/patio areas, sheds, free-standing garages, even remote outbuildings on your property. Hub Required Required App Remote Control – A zigbee gateway is required to connect the Humidity Temperature Sensor via smartphone app. Zigbee Gateway Please buy apart. Smart Alert & Automate Your Appliances – As the temperature and humidity of your room is changed, throgh the app, your app connected air condition, humidifier, etc will auto working to adapt to environmental changes. Wide Application – By automate humidifier/dehumidifier, air condition etc, great to balance the living condition, storage condition or greenhouse plant growth conditions etc. High Accurate Monitor – With built-in high sensitivity sensor, it provides high precise monitoring. Temperature range: -10-55°C Humidity range: 0-99.9%RH. The temperature is accurate to ±0.5°C, while