These meters are light weight, tiny in size with simple, one-hand, operation. They are perfect for scientists, agricultural specialist, facilities managers, HVAC professionals, home inspectors, field technicians, health and safety personal, hazmat crews, outdoor enthusiasts, educators, and coaches … all of whom need accurate information to properly access environmental conditions and make crucial decisions. Reads air speed in addition to the wide selection of environmental parameters detailed above. Accurately measures liquid and solid temperatures using the optional Pt 1000 penetration probe. Will sense airflow as low as 0.4 m/s with an accuracy of ±3% (4% >20 m/s). Replaceable snap-in anemometer vane is available. Features min/max, hold, a backlight and come complete with a wrist strap, carry pouch, and button cell battery providing at least 40 hours of continuous use. • 5 year warranty, CE, RoHS • Wind Speed Air Temperature Air Volume • Relative Humidity (RH) Wind Chill Heat Stress Index • Dew Point Wet Bulb PT 1000 ohm (with Optional Probe) • Barometric Pressure Altitude Visible Light