The Extech 445580 Humidity/Temperature Digital Compact Hygro-Thermometer Pen is a portable and reliable instrument designed for field use. This compact hygro-thermometer is an essential tool for professionals who require accurate measurements of humidity and temperature on the go.The Extech 445580 is designed for convenience and durability. With its slim and compact design, it is easy to carry in your pocket or tool bag, making it ideal for fieldwork and outdoor activities. The long-lasting 3V lithium battery ensures maximum usage time, allowing you to rely on the meter for extended periods without worrying about frequent battery replacements.This hygro-thermometer offers a wide range of humidity and temperature measurement capabilities. It can accurately measure humidity readings from 10 to 90% RH, providing valuable information about the moisture content in the air. Additionally, it registers temperature readings from 14° to 122° Fahrenheit (-10 degrees to 50 degrees Celsius), enabling you to monitor temperature fluctuations in various environments.The Extech 445580 is particularly useful for fieldwork and outdoor enthusiasts. Whether you need to monitor humidity and temperature in agriculture, construction, or environmental research, this compact hygro-thermometer is a valuable tool for accurate and reliable measurements.The meter features a memory function that stores the maximum and minimum readings until the memory is cleared. This allows you to review the highest and lowest recorded values, providing valuable insights into the range of measurements over a period of time. Additionally, the data-hold button is designed for rapidly fluctuating measurements, ensuring you can capture and retain the desired readings.