TP-Link TAPO T315 Smart Temperature and Humidity Monitor SPEC: 868 MHz, battery powered(2*AAA), 2.7 inch E-ink display, temperature range and accuracy: 0℃~50℃, ±0.3℃，humidity range and accuracy: 0~99%RH, ±3%RH Feature: Tapo smart app, Battery Included

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.