Acer RL100 - Manual (Page 14)

Using the wireless touchpad 4
Englis
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Keyboard mode:
Touchpad toggle
Press the toggle key (on the top right) to switch the wireless
touchpad between mouse mode and keyboard mode.
1 Press the power button once to turn on, or switch between mouse
and keyboard modes.
2 Press and hold for 3 seconds to turn off.
Note: Press the toggle key and USB RF 2.4 GHz receiver button for
5 seconds to start ID paring.
Press and hold the power button (in keyboard mode) for 3 seconds to
turn on.