Includes:

ST-805 Sound Level Meter - this sound level meter meets IEC651 Type 2 requirements

• Range: Low 35 to 100 db, High: 65 to 135 db
• Resolution: 0.1 dB
• Accuracy: +/- 1.4dB

LM-8000 - 4-in-1 multi-function meter that features an anemometer, humidity meter, light meter and type K digital thermometer

• Range: Aire Velocity: 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: Humidity: 0 to 95% RH; Temperature: -148 to 2372 degree F; Light: 0 to 20,000 lux
• Resolution: Air Velocity: 0.1 m/s; 0.1kph; 0.1 mph; 1 fpm; 0.1 knot; Humidty: 0.1% Rh; 
• Temperature: 0.1 degree F
• Light: 1/10 lux

77535 indoor air quality meter that simultaneously monitors carbon dioxide, relative humidty and temperature:

•  Range: CO2: 0 to 5000 ppm
• Humidity:  0 to 99.9% RH
• Temperature: -10 to 60 degree C
• Dew Point: -73.4 to 60 degree C
• Wet Bulb: -13.3 to 60 degree C
• Resolution: CO2: 1 ppm; Humidty: 0.1% RH; Temperature: 0.1 degree C