TP-Link Tapo T315 Smart 868MHz Temperature & Humidity MonitorReal-Time & Accurate Monitoring - Detects real-time temperature and humidity with great accuracy. (Measurement Accuracy: +/-0.54 ?F, +/-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.