Press and hold both Volume buttons while not on a call.
Indicator light
red
yellow
green
To save battery power, turn off the headset when you don't use it for an
extended time.
battery check
voice prompt
" battery level is low "
" battery level is medium "
" battery level is high "
talk time
less than 2 hours
between 2 to 4.5 hours
more than 4.5 hours
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