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2. Scroller / Power-low Indicator LED: scrolls the screen
up and down; same as the scroll wheel in a traditional
mouse. Also doubles as power-low indicator: when scroller
flashes with red LED light it’s an indication that batteries
need recharging. Just plug in the USB charging cable to the
keyboard and the computer to charge the batteries. (Please
see Charging the Batteries section.) The keyboard is still
functional during recharging.
3. Mouse Left- and Right-click: performs the traditional
mouse left-click and right-click functions.
4. Hot keys: Internet Launch, Previous Track, Next Track,
Stop, Play/Pause, Mute, Volume Down, Volume Up.
5. NumLock function: when NumLock is on, the right-hand
section of the keyboard doubles as numeric keypad. To return
to alphabet-mode, press the NumLock key one more time to
turn it off. (See Fig. 9)