Sony ICD-PX440 Stereo IC MP3 Digital Voice Recorder Built-in 4GB and Direct USB + AAA Batteries & HeroFiber Ultra Gentle Cleaning Cloth 4 GB of memory lets you store up to 1043 hrs (MP3 8 kbps) Supports up to 32GB of additional storage via its microSD card slot Direct USB (Slide, Store) - Transfer files without the hassle of cables Up to 98 Track Marks in each recorded file, Automatically Playback Important Notes Intelligent Noise Cut function significantly minimizes surrounding ambient noise for clearer playback