Mini digital humidity thermometer gauges, allows you to measures indoor humidity and temperature in time around you. Built-in probe, handful of humidity and temperature sensors to scatter through your house, always be aware of your home conditions. Round room thermometer supports Fahrenheit () or Celsius () conversion: the square humidity meter shows the temperature in Fahrenheit, and only the round room thermometer shows the temperature in Fahrenheit or Celsius (press the conversion button of /). Advanced temperature sensor keeps temperature measurement accuracy to 1F, Humidity measurement accuracy: 2%; Temperature measurement range: -58C-158F, Humidity measurement range: 10%-99%. Applicable for jar, canning jars, cigar humidors, guitar cases, greenhouse. Small gauges just put it in the corner of the or attic. Colour:black :plastic Package Contents: 8 x Square -Hygrometer 2 x Round -Hygrometer 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.