Product features:
Range: 30-130 dB.
Accuracy: strong > +- 1.5 dB
Operating temperature and humidity: 0-40 °C, 10 - 80 %RH
Storage temperature and humidity: 10-60°C, 0-90% RH
Power source: 3 x 1.5 V AAA batteries
External dimensions: 56.1 x 177 x 36.03 mm