1. [Room Climate Indicator]: Humidity meter with humidity levels with red/green/blue colors indicating dry - comfort - wet air condition, which can remind you to adjust your humidifier or dehumidifier accordingly and help you will always live in the most comfortable environment. The included 2 CR2032 battery is built to long last. (Before shipping, we installed the battery into the thermometer for final testing. We guarantee the product is .) 2. [3.5Inch Easy-to-Read LCD Display]: The thermometer hygrometer features a 3.5in clear LCD display which is larger than most thermometers' screens, allowing you to read the digital from any angle. The hygrometer digital is lightweight, compact, and easy to carry. 3. [Reliable Accuracy]:The measurable temperature range: -40 ℉ ~ + 158 ℉(-40 ℃ ~ + 70 ℃), which is in either °C or °F. Temperature measurement accuracy: ± 1.0 ℉, temperature resolution: 0.1 ℉. Measurable humidity range: 10% RH ~ 99% RH, humidity measurement accuracy: ± 5% RH, humidity resolution: 1% RH. 4. [Three Mounting Options]:The humidity temperature meter has table stand, hanging hole, sticking mounting options. There are independent holders that can be placed on the table or bookshelf, or attached to the wall with double-sided tape or hanging holes.