Introducing a high - tech 3 - pack humidity temperature sensor. It has a compact design, measuring 1.1 x 1.1 x 0.8 inches, and comes in a package of 5 x 2.8 x 2.5 inches, weighing 0.51 pounds. The Swiss - made sensor provides high - precision readings, measuring temperatures with ±0.54°F / ±0.3℃ accuracy and humidity within ±3% RH, with data refreshed every 2s. You can connect the gateway to the app via 2.4GHz WiFi, pairing up to 10 sensors. Set your desired temperature and humidity values on the app. When there's a change, you'll get notifications via app and email. It also allows you to store and export data, viewing the trend chart of the past 20 days and exporting data from the past 2 years. Suitable for wine cellars, bedrooms, basements, greenhouses, and farms, it offers great convenience for monitoring indoor climate.