[TWO IN ONE DESIGN] 2-1 Indoor Thermometer & Hygrometer is great to keep track of the temperature and humidity, temperature measurement range: -40~140°F (-40~60°C), Accuracy: +/-2°C; Humidity measurement range: 0~100%RH, Accuracy: +/-7% RH (40~70%RH). [EASY TO READ] The Humidity Gauge is handcrafted from solid plastic with fine and clear dial, easy to read the scale. It is easily readable from a distance because of the large display in 10inch Diameter . The temperature shows both °C and °F readings. [GOOD FOR HEALTH] Thermometer hygrometer monitor ensures proper indoor / outdoor temperature and humidity control which is important to skin, allergen and other . [NO BATTERY REQUIRED] Mechanical thermometer and hygrometer has a longer life expectancy in use, no battery required. Avoid violent vibration and hitting, and do not disassemble by yourself. [WIDE APPLICATIONS] The weather thermometer doesn't take up a lot of space, just hang it . Perfect for houses, offices, workshops, schools,