This 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 ~90cm5. Temperature Readings: Max/Min/Current6. Temperature Display: Centigrade or Fahrenheit7. Moisture Display: Percent8. Power: 1 x Standard AAA Battery (not included)9. Size: 8x7x1.5cm / L*W*H10. Color: As picturesIdeally you want the temperature of inside to be between 18?? - 25?? 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.Package Included:1 x Digital Thermometer Hygrometer1 x User Manual