Real-Time & Accurate Monitoring - Detects real-time temperature and humidity with great accuracy. (Measurement Accuracy: ±0.54 ºF, ±3% RH). E-ink Display - Indicates temperature & humidity, comfort level with facial expressions, battery condition, and signal. Home Automation - Automatically turn on/off home electronics when settings fall outside preset range(s). 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. Package ContentsTapo T315 × 1AAA/LR03 battery × 23M Adhesive × 1Quick Start Guide × 1