Multi-function meter: temperature, air velocity, relative humidity and light meter 45170

Features: * Ergonomic pocket size housing with large dual LCD simultaneous display of Temperature and Air Velocity or Relative Humidity * Characters on display reverse direction depending on Hygro-Thermo-Anemometer or Light Mode * Data Hold to freeze the displayed value * Records Min/Max readings * Built-in low friction vane wheel improves accuracy of air velocity in ft/min, MPH, m/s, km/h, and Knots * Built-in precision thin-film capacitance humidity sensor for fast response * Built in thermistor for ambient temperature measurements * High temperature measurements using Type K thermocouple * Utilizes precision photo diode and color correction filter * Cosine and color corrected light measurements * Auto power off, Low Battery and overrange indication * Complete with built-in Humidity sensor, Light sensor and Vane wheel, wrist strap, and 9V battery