Fast responding pocket size design allows for one-handed operation. 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. • 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 Celsius or Fahrenheit. • Data Hold and Max/Min functions. • Zero adjustment button (light meter). • Low battery indicator and auto shut off. • 6.1 H x 2.4 W x 1.3 D. • Black. • Air velocity range of 0.2 to 30.0 m/s; 1.4 to 108.0 kph; 0.9 to 67.0 mph; 80 to 5910 fpm; 0.8 to 58.3 knots. • Air velocity resolution of 0.1 m/s; 0.1 kph; 0.1 mph; 1 fpm; 0.1 knot. • Temperature range of -148 to 2372 degrees Fahrenheit (-100 to 1300 degrees Celsius). • Temperature resolution of 0.1 degrees Fahrenheit (0.1 degrees Celsius). • Humidity range of 0 to 95% RH. • Humidity resolution of 0.1%RH. • Light range of 0 to 20 000 Lux (0 to 2000 ft-cd). • Light resolution of 1/10 lux (0.1/1 ft-cd). • Powered by a single 9V battery (included). • Weighs 8.8 oz. (160gram). • Sold as 1 Each.