This is a Portable Sound Level Meter with a datalogging function. The Center Model 322 is a professional ‘Type II’ meter with range selection and both digital and bar graph indication. Gather all data with the 32,000 records logger and once collected user can download to the computer at their convenience. This is the newest model with the latest firmware which remembers settings after power off. A USB cable for interfacing with the PC is included in addition to free PC software for meter configuration, data downloading, and data viewing.