Sony's ICD-UX543F voice recorder is perfect for recording lectures as well as listening to your favorite tunes in between classes or at the office. 
Equipped with Digital VOR and scene select function allows you to select five modes of recording scenes.

SPECIFICATION 
4GB Internal Storage with Expandable microSD Slot
Direct USB (Slide, Store and Charge)
FM Record and Play
Linear PCM/MP3/WMA/AAC Playback
Intelligent Noise Cut / Low Cut Filter / Digital VOR
Digital Pitch Control / Scene Select
Built-In memory  4GB
PC Connectivity  Yes
Recording Format  Linear PCM/MP3
Playback Format  LPCM/MP3/AAC/WMA
Messages/Folders  4074/400 (199 file in each folder)
Earphone Jack  Yes
Battery type  Built-In Lithium Battery
Dimension (W x H x D)  Approx 36.6 x 101.5 x 10.5 mm
Weight (including batteries)  Approx 49g
Mic-In Jack  Yes
Recording time LPCM (44.1kHz, 16-bit)  6 Hrs
Recording time MP3 (44.1kHz, 128kbps)  26 Hrs
MP3 128kbps Recording Time  67 Hrs 05 Min
Speaker power output  150mW
Speaker size  16mm
Overall frequency response LPCM (44.1kHz, 16-bit) : 50 - 20,000 Hz
Overall frequency response MP3 (44.1kHz, 128kbps) : 50 - 16,000 Hz

WHAT IS IN THE BOX ? 
Sony ICD-UX543F 4GB voice recorder