Digital voice recorder internal memory 16 384 mb max recording time 15 h recording formats lpcm mp3 function usb charging play functions speed control a b repeat alarm playback playback formats mp3 aac wma wav number of sound folders 400 number of files per sound folder 199 recording quality mp3 48 192 kbps dimensions 20 x 102 x 7 4 mm weight 29 g