Digital voice recorder dictaphone kit memory expansion secure digital sd max recording time 700 h recording formats dss mp3 pcm connections usb 20 microphone headphones memory card slot features built in speaker function pc connection display tft display size 24 inch display size cm 61 cm operating time 27 h speaker diameter 28 mm output mw 200 mw dimensions 123 x 53 x 15 mm weight 117 g