When the use of firmware version Ver.2.00

The maximum recordable time per 1 file is 15 minutes.

When the use of firmware version Ver.1.**

The maximum recordable time per 1 file is 3 minutes. Recording time can be set 3 minutes or more. Even in such case, recording is automatically stopped and created a recorded file after lapse of 3 minutes. Generally, provide a buffer to prevent failure to receive data while operating A/D conversion, transfer, and storing the data for filing the sound data. The Sound Level Meter which is used in this case has the buffer region, but the absolute amount is small, so if 3 minutes or more recording is operated, failure to receive data may occur.