Fast & Accurate Monitoring - Detects temperature and humidity with great accuracy; Updates every 2 seconds; (temperature thermometer Accuracy: ±0.3 °C, ±3% RH) Home Automation - Automatically turns on/off home electronics when settings fall outside their present ranges; Tapo hygrometer humidity meter is a great tool for your home automation; also can be used as baby room thermometer , outdoor thermometer and greenhouse thermometer Free Data Storage & Visual Graphics - Tapo humidity sensor records temperature and humidity data and generates periodic data summaries. Up to 2 years’ free cloud data storage, and export at any time Real-Time Notifications - Receive instant alerts on your phone whenever levels fall outside present ranges. Set up quickly and easily through the free Tapo app Flexible Installation - Hang it with a lanyard, attach it on a surface with an adhesive or magnet, or simply place it on a desk Voice Control – Manage your Smart Temperature & Humidity Monitor with voice commands via Amazon Alexa( only can control Temperature) or the Google Assistant Hub Required: The Tapo Hub is required to support all smart features: Tapo H100 or Tapo H200 (sold separately) This device operates exclusively within the specified Sub-1G band; Please note that different regions support different frequency bands; Ensure that the devices or hubs you intend to use are compatible with the same Sub-1G band