Sony's feature-rich, pocket-sized PCMM10 Portable Linear PCM Recorder is ideal for recording audio on the go and on a budget. Despite its small size, this portable recorder has 24 hours of battery life and a 4 GB solid-state internal flash drive. You can also expand the storage capacity by adding a memory stick into the provided slot. It has many useful features including digital pitch control, key control, a digital sound limiter, cross-memory recording and track marking functions.