Description: The thermo-hygrometer can measure indoor and outdoor at the same time. It can be seen that the outdoor sensor is placed at a distance of 100m328ft to measure the data, and the outdoor can be checked on the indoor host. Features: [Useful]The hygrometer help to adjust the humidifier, dehumidifier settings, humidistat, etc. [Accuracy]Digital hygrometer provide updated and accurate readings. Data measurements are updated every 2s to give you the latest changes in the environment. [Comfort Indicators]Support , comfort, and dry three kinds of humidity comfort indicators, as well as window reminder suggestions. [Easy to Read]The humidity gauge has a bright front panel with a clear LCD display, easy to read even from a far distance. [Widely Applicable]Suitable for kitchen, garden, greenhouse, basement, room, guitar room, and office. Specifications: Color: White; Black (Optional) Material: ABS, Electronic Component Style: Casual Indoor : -9.9℃～+50℃ & 14℉～+122℉ Outdoor : -40℃～+60℃ & -40℉～+140℉ Humidity : 20%RH～95%RH Humidity Meter Battery: 3*AAA Battery(Not Included) Outdoor Sensor Battery: 2*AAA Battery(Not Included) Occasion: Home, Hotel, School Package Size: 15.5*15.2*3.5cm / 6.1*5.98*1.37inch Package Weight: 280g / 0.61lb Package List: 1 * Electronic Humidity Meter 1 * Outdoor Sensor 1 * User Guide