The Extech 407790A octave band analyzer with integrated Type 2 sound level meter measures the sound level in 5 measuring ranges (20 to 90 dB, 20 to 100 dB, 20 to 110 dB, 30 to 120 dB and 40 to 130 dB). The basic accuracy is ±1.5 dB. The scope of delivery includes a microSD card.