TP-Link Tapo T310 Smart Temperature and Humidity SensorFast & Accurate Monitoring - Detects temperature and humidity with high-accuracy Swiss-made sensor. Obtaining and update data every 2 seconds. (Accuracy: +/-0.3 degC, +/-3% RHHome 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 is required.