Zoom H4n - Manual (Page 15)

Name and function of each part
014
[BOTTOM PANEL]
DC5V AC ADAPTER jack
Optional remote-control jack
[LINE/PHONE] output jack
USB port
POWER switch
HOLD switch
[LEFT PANEL]
[DIAL]
[MENU] button
REC LEVEL [ + / − ]
SD card slot
[RIGHT PANEL]
VOLUME [ + / − ]
Installed hole
for a strap
XLR/STANDARD PHONE
INPUT [1] jack XLR/STANDARD PHONE
INPUT [2] jack