Never miss another thought, word or note with the ICD-SX733 digital voice recorder. Whether recording music or lectures, this recorder is the ideal choice for musicians, business professionals and students. Capture exceptional audio quality via the built-in, 3-element stereo microphone while a built-in memory card expansion slot allows additional recording time for up to a maximum 1,073 hours. Built-in, 4GB flash memory provides up to 159 hours. Compatible with PC and Mac, this voice recorder also has a convenient, retractable USB terminal enables direct connectivity. Dual analog to digital converters work in tandem to deliver wider dynamic range with minimized distortion. Pre-record Mode buffers sound for five seconds before the record key so you don't miss a word or note. When activated, the Voice Up function amplifies low volume sounds so distant voices can be heard. Built-in rechargeable battery delivers up to 19 hours of recording time.