1.Accurate and fast response: Provides readings every 10 seconds at temperatures from 9.9 to 50 °C and humidity of 10 to 99% RH. 2.COLOR AIR COMFORT INDICATOR Features an intelligent level indicator. At a humidity of 40%, the arrow points to the red area, which means DRY. At a humidity of 40 70%, the arrow points to the green area, which means comfort. At a humidity of >70%, the arrow points to the blue area, which means WET. This function can help to adjust humidifiers, dehumidifiers and hygrostats for optimal comfort and . 3.CONVENIENT CLOCK CALENDAR Works as a clock and calendar with a 12/24 hour switch and updated European date format TT/MM. Note: No backlight. 4.Versatile mounting options: can be installed with stand, magnet or wall mount with adhesive pad. Compact size: 9.3 x 7.7 x 1.5 cm and lightweight design for easy placement anywhere. Includes a long lasting CR2032 button battery.