Real-Time & Accurate Monitoring - Detects real-time temperature & humidity with great accuracy. (Measurement Accuracy: ±0.54 degrees F, ±3% RH). 2.7" E-ink Display - Indicates temperature & humidity, comfort level with facial expressions, battery condition, & signal. Home Automation - Automatically turn on/off home electronics (e.g. heater, fan, humidifier & more) to maximize conform & save energy. Instant App Notification - Receive app alert notification when conditions fall outside preset range. Free Data Storage & Visual Graphs - Record temperature & humidity data & generate periodic data summary. Flexible Installation- Just place it on the desk or mount it on the wall. Hub Required - The Tapo H100 or Tapo H200 Hub (sold separately) is required to support smart features, like remote monitoring, home automation, data export & more.