Real-Time & Accurate Monitoring - Detects real-time temperature and humidity with great accuracy. (Measurement Accuracy: ±0.54 ºF, ±3% RH). 2.7" E-ink Display - Indicates temperature & humidity, comfort level with facial expressions, battery condition, and signal. Home Automation - Automatically turn on/off home electronics (e.g. heater, fan, humidifier and more) to maximize conform and save energy. Instant App Notification - Receive app alert notification when conditions fall outside preset range. Free Data Storage & Visual Graphs - Record temperature and humidity data and generate periodic data summary. Flexible Installation- Just place it on the desk or mount it on the wall. Hub Required - The Tapo Hub is requried to support smart features, like remote monitoring, home automation, data export and more.