The Triplett EM400 8-in-1 Environmental Meter measures Air Temperature, Humidity, Type K Temperature, Wet Bulb, Dew Point, Heat Index, Sound, and Light. Readings are displayed on the dual backlit LCD that automatically reverses when taking Light measurements. The Triplett EM400 features a concise and compact button arrangement for easy one-hand operation. Sound level readings meet IEC 61672-2013 class 2 sound level accuracy (±1dB@1kHz and the high precision humidity sensor has a fast response time. Temperature readings are °F/°C switchable. Min/Max records highest and lowest readings. Data Hold freezes the reading on the display. Auto power off with disable conserves battery life. The built-in tripod mount can be used to free-up your hands when taking measurements over an extended amount of time.