Freedom Scientific Ruby User Manual page 7

4. You can now use your RUBY for approximately two hours of continuous
use. When the batteries are low, the battery indicator LED flashes red.
Connect the power adapter and plug it in to recharge the NiMH
batteries.
Note: If you decide to replace the supplied NiMH batteries, replace all
four at the same time with 1000 mAh NiMH batteries.
Turning On RUBY
1. Press the green/yellow button
the battery status icon displays on the screen.
2. Press the button again to turn off RUBY.
Note: If RUBY is left on and no buttons are pressed, it automatically
turns off after 30 minutes to avoid draining the batteries.
to turn on RUBY. After a few seconds,
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