The Extech 45170 4-in-1 Meter is a versatile and comprehensive instrument designed for measuring humidity, temperature, air velocity, and light. This multi-functional meter is ideal for a variety of applications, ranging from HVAC system assessments to environmental monitoring.The Extech 45170 features a dual LCD that simultaneously displays temperature and air velocity or relative humidity, providing you with real-time readings for quick and easy analysis. This allows you to assess multiple parameters at once, saving you time and effort.In addition to humidity and temperature measurements, the Extech 45170 also provides accurate readings of air velocity and light levels. This comprehensive set of measurements allows you to gather valuable data for a complete understanding of the environmental conditions.The meter is equipped with a built-in Type K input, which enables high-temperature air or surface measurements. This feature is particularly useful when dealing with elevated temperatures, allowing you to expand the range of measurements and ensure accurate readings.With its user-friendly design, the Extech 45170 is easy to operate and provides reliable measurements. Its compact size and lightweight construction make it portable and convenient to use in various locations and environments.