Panasonic RR-US550E9-S dictaphone

RR-US550E9-S - 512 MB, MP3, USB2.0, 65 g MP31 Recording/Playback (Monaural).
Up to Long 142 Hours 50 Minutes Recording (Monaural SLP Mode).
Capacity of Flash Memory 512MB.
Long Battery Life: 45 Hours with Alkaline Battery (Monaural SLP Mode Recording).
USB Mass Storage and USB 2.0 High-Speed Connection.
Security Function2 with Password.
Recording of Maximum 99 Files Each in 4 Voice Recording Folders and 999 Files in 1 Music Folder.
3 Recording Modes (XP/ LP/ SLP).
Digital VAS (Voice Activated System) Function.
Playback Equalizer.
Speed Control (5 Steps).
Repeat Functions (1 File Repeat/ A-B Repeat/ All Files Continuous Playback/ Folder Repeat).
Auto Back Space.