Description:Package Included:1pc x Digital Thermometer Hygrometer1pc x User ManualThis Digital LCD Indoor Outdoor Weather Thermometer Hygrometer，help you know both the temperature and air moisture content and help to keep a comfortable constant temperature and humidity.Features:1. 100% Brand New，High Quality2. Temperature Sensors: Indoors/Outdoors3. Indoor Sensor: Built-in4. Outdoor Sensor: Wired ~35.4"/90cm5. Temperature Readings: Max/Min/Current6. Temperature Display: Centigrade or Fahrenheit7. Moisture Display: Percent8. Power: 1 x Standard AAA Battery (not included)9. Size: 3.15*2.7*0.6in / 8x7x1.5cm L*W*H10. Color: As picturesIdeally you want the temperature of inside to be between 18¡ã - 25¡ã and the moisture content to be between 40% - 65%. This thermometer will display a smiling face as long as these parameters are met. If not， the face will no longer be smiling， which is a sign that you need to improve the conditions inside.