REAL-TIME UPDATE & ALWAYS ACCURATE: Indoor thermometer is accurate to ±0.1℃ and ±5%RH humidity accuracy. Support data storage and export, Digital temperature gauge supports ℃/℉ reading. Wi-Fi THERMOMETER HYGROMETER WITH SMART ALERTS: Connecting with 2.4GHz WiFi(No 5G support), Whether you are or away, you always know the temperature and humidity from the wifi temperature sensor. Alert be sent to your phone when beyond preset value. LARGE LED BACKLIT DISPLAY & EXCELLENT AFTER-SALES SERVICE: Room thermometer for home with a 3.2 inch backlit LED display, Clear reading even in the dark, the backlight can be turned off via the app. Wifi thermometer indoor powered by USB cable, please plugged in with USB cable all the time.