... indicator, Backlight display,data hold , Infrared thermometer Compact rugged and easy to use. Just aim and push the button, read current surface ... 95 fixedWorking environment 0-50 °CRelative humidity10%-95RH noncondensingStorage temperature-20 °C to 50 °CWeightNet weight 20gSize19x85 mm ... the test button toward the object measured, and the meter will turn on and read the test-result on LCD display . ...