Mini round digital humidity thermometer allows you to easily know the environment temperature and humidity around you Fahrenheit (F) or Celsius (C) conversion, this round thermometer displays temperature in Fahrenheit or Celsius (pressing the conversion button of /) Measurable humidity range: 10%-99%, humidity measurement accuracy: 5%-10% (room temperature 25). Reliability, measured every 10 seconds, provides the latest and accurate measurement results. Household humidity and temperature monitor: This portable thermometer measures indoor humidity and temperature, which helps you to understand indoor air conditions. Become an Perfect choice for personal and professional life. Battery: LR44 button cell Colour:black Material:ABS Size:about 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.