BSWA309 噪音分析儀(Class 2) Class 2 1/1 Octave Sound Level Meter , with Type 2 micophone, with 4G microSD card, With carrying case, a 9-cm windscreen, 4 AA batteries, and calibration chart, Frequency Weighting of Parallel A, B, C, and Z
Under the database:BSWA-308-309-en.s.pdf