4GB built-in flash memory–up to 272 hours recording time ; Recording mode selectable; Records files in WAV format ; Voice-activated system–recording stops when sound stops ; Stores up to 99 files ; Easy-to-search file folders & hold feature ; Multifunctional LCD ; Built-in speaker; Built-in microphone ; Battery level indicator ; 3.5mm headphone output; Battery life: records–13.5 hours, playback headphone–9 hours, playback speaker–3.5 hours ; Dim: 4.25″H x 1.18″W x .59′”D ; Requires 2 AAA batteries ; Includes USB data transfer cable;