Sony IC Recorder 4GB AAA Battery Compatible USB ICD-PX240 2.0

With 4GB of built-in memory, the maximum recording time is approximately 1,043 hours. *When recording in LP mode (MP3 mono 8kbps) Equipped with a "noise cut filter" to reduce noise "Digital Pitch Control" allows playback at a natural pitch whether listening at high or low speed (0.5x - 2x speed) Two AAA batteries