Zoom keys. Press to zoom in and out.

Back key. Press to return to the previous menu.

Thumb Stick™controller. Move directionally to scroll or highlight an item. Press to select an item.

Menu key. Press to open the menu for a page. Press twice to return to the main menu.

Press to adjust the backlight. Hold to turn the device on or off.

Mini-USB port (under weather cap).

Battery cover.

Battery cover locking ring.

Mounting spine.