Fast responding, pocket size design allows for one-handed operation. REED LM-8000 Offers This compact 6-in-1 environmental meter measures air velocity, air temperature, ambient temperature, relative humidity, light and contact temperature. The LM-8000 features Data Hold, Minimum/Max functions and has been designed for one handed operation. Features Measures air velocity/temperature, ambient temperature, relative humidity, contact temperature and light Easy to operate, designed for one hand operation Air velocity is measured in m/s, ft/min, km/h, mph or knots Light levels are measured in foot-candles or lux Temperature is measured in °C or °F Data Hold and Max/Min functions Zero adjustment button (light meter) Low battery indicator and auto shut off Included Multi-Function Environmental Meter Wrist Strap Battery