Usage Tips:[High Accuracy & 24 Sensitive Vents]digital room thermometer of 24 sensitive VENTS provide accurate readings, fast response with every 10 seconds. Wide measuring range that measures temperature from 32Fahrenheit to 122Fahrenheit(0Celsius~50Celsius), temperature accurancy range around +/- 2.7Fahrenheit ( +/- 1.5Celsius). Humidity sensor measures humidity from 20% to 95%, humidity accuracy range around +/- 5%. [Great Visibility & Easy Operation]Wall thermomFter indoor displays temperature in Fahrenheit or Celsius by button(Fahrenheit/Celsius Switchable). A clear LCD display, easy to read even from a far distance. Comes with a CR2 batteries and 6 months working time. NOTE:Please remove the protective film before use. [Stylish Design & Professional]hygrometer thermometer measures indoor humidity and indoor temperature in time help to adjust the humidifier, dehumidifier settings and humidity, great for monitoring family's living conditions and health by preventing colds, dry skin, asthma, allergy, mold. [Multiple Mounting Options]humidity gauge indoor hygrometer with magnet attaching, table standing, and wall hanging design, put anywhere you want, convenient mounting feature for every type of room like kitchen, garden, greenhouse, basement, baby room, guitar room and office. Colour:black Material:ABS Package Contents: 1 x Temperature and hygrometer Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.