SMART APP CONTROL & DATA STORAGE EXPORT: Easily monitor temperature and humidity in real time on "Tuya Smart" or "Smart life" app by connecting via Bluetooth. The smart temperature sensor supports °F/°C Reading, Viewing History Records and Temperature Humidity Graphs. You can get the latest temperature and humidity records via the curve graph. Press "Export Data" in the app to export the data to your email. (Not WiFi Version) EVEN BETTER WITH A GATEWAY: Use a Bluetooth gateway (Not included), you can set the alarm range to receive an alert when the value is exceeded; you can set smart routines, such as automatically turning on the air conditioner when the temperature reaches 26°C; and after connecting Alexa and Google, you can find out the current temperature humidity by voice. D DISPLAY: This room hygrometer is designed with a 3.5 inch large LCD backlit display, which makes it easy to use your hygrometer to read temperature and humidity data at any time. Maximum/minimum temperature humidity records and comfort indicators let you know the indoor temperature and humidity and comfort level at a glance. HIGH ACCURACY & ℃/℉ SWITCHABLE: With Swiss-made smart hygrometer sensor, the temperature is accurate to ±1°C while the humidity is ±5%RH. You can switch the temperature unit between ℃ and ℉ by pressing the reset button once or via the mobile app. LOW POWER CONSUMPTION & TWO MOUNTING OPTIONS: This thermometer hygrometer is powered by 3ps LRO3 alkaline batteries (included), which is super power-saving and has a long standby feature. Put it on the table or mount it on the wall, decorate your room in simple style. We provide a 24-month warranty for the home temperature monitor.