The radio is comfortably large, fitting the hand nicely. The gray part sticking up at the top is the cover for the mic-earpiece jacks. Note that the base is rounded - it won't stand up on the base, which is aggravating.
The horizontal button near my finger is the CALL button - it transmits a deedle-deedle to all radios on the frequency. The two vertical yellow buttons are the UP and DOWN button; when it receive, they control volume. The gray button on top near my thumb is the MODE button - pressing it cycles through the various modes, then you use the UP or DOWN button to make selections within a MODE (select channels, for example, or CTCSS tones). The second gray button toggles VOX, the third gray button locks/unlocks the radio, and the bottom gray button toggles WX from NOAA.
From Columbia MURS Radios