Testo 816-1 Datalogging Sound Level Meter, 30dB to 130dB, 8kHz max
1 dB, Accuracy Class: IEC 60942 Class 2, Weighting: A, C, Display Type: Backlight, Battery Type: AA, Fast/Slow Time Averaging: Both, Data Logging: Yes, Interface Type: USB, Maximum Operating Temperature: +40°C, Minimum Frequency: 20 Hz, MPN: 0563 8170.Testo 816-1 Datalogging Sound Level Meter, 30dB to 130dB, 8kHz max, Resolution: 0.