Sony’s ICD-UX533BLK digital recorder has 4GB of internal flash memory. It can record and playback in MP3, AAC, WMA, and WAV formats. The unit averages 4.5 out of 5 stars on Amazon from over 200 customers. Amazon indicates that its typical list price of $99.99 has been reduced 23% to $76.95, saving you $23.95. It boasts up to 30 hours of recording time on a single charge.”]