BENETECH GM1356 2.2" LCD Digital Sound Level Meter - White + Black (4 x AA)
2.2" display screen; Calibration sound source:94dB@1KHz; Measurement range:30~130dBA'35~130dBC; Accuracy: +/-1.5dB; Frequency response: 31.5Hz~8.5KHz; Resolution:0.1dB; Measuring level:30~8050~10060~11080~13030~130; Dynamic range: 50dB/100dB; Overload indication:OVER / UNDER; Frequency weighting characteristic: A and C CD: http://m5.img.dxcdn.com/CDDriver/CD/sku.328816.rar