Samsung M520 Owner's Manual page 42

4.
microSD Card Slot allows you to install an optional microSD card
for use in Contacts, data, and media.
5.
Camera Key allows you to take pictures when in camera mode.
6.
Camera allows you take a picture or video of whatever is in front of
the phone's line of sight.
Note: Video is shot in MPEG-4 format at 15 fps with a maximum recording
time determined by the available space on the storage media (phone or
memory card). The video quality is as follows: 100k (Fine), 80k
(Normal), 64k (Economy).
16 Section 2A: Phone Basics