This mini round digital humidity thermometer lets you easily check the ambient temperature and humidity around you. Fahrenheit (F) or Celsius (C) conversion; this round thermometer displays the temperature in Fahrenheit or Celsius (by pressing the conversion button /). Measurable humidity range: 10%-99%, humidity measurement accuracy: 5%-10% (room temperature 25). Reliable, measured every 10 seconds, providing the latest and most accurate readings. Household Humidity and Temperature Meter: This portable thermometer measures indoor humidity and temperature, helping you understand indoor air conditions. A perfect choice for both private and professional use. Battery: LR44 button cell Color: Black Material: ABS Size: approx. 45 x 45 x 14mm Package Contents: 10 x Digital Thermometers Only the above package content, other products are not included. Note: Light reflection 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.