Model: icd-px370
power source: 2 \times aaa batteries (1.5v)
built-in usb: direct slide-out usb-a connector for charging/file transfer without needing cables
storage & expansion: built-in internal memory with support for microsd expansion cards
controls:
front: record/pause, stop, navigation pad (play, skip, dpc, a-b repeat), back/home, track mark (t-mark), and option buttons
side: hold/power switch
microphone/speaker: built-in mono microphone at the top and front speaker grille at the bottom