Fast & Accurate Monitoring - Detects temperature and humidity with high-accuracy Swiss-made sensor. Obtaining and update data every 2 seconds. (Accuracy: ±0.3 °C, ±3% RH） Home Automation - Automatically turns on/off home electronics when settings fall outside their preset ranges. Free Data Storage & Visual Graphics - Records temperature and humidity data and generates periodic data summaries. App Notification Alerts - Receive instant alerts on your phone whenever levels fall outside preset ranges. Flexible Installation - Hang it with a lanyard, attach it on a surface with an adhesive or magnet, or simply place it on a desk. Hub Required- Tapo Smart Hub (Tapo H100 or Tapo H200) is required.