Dell Inspiron M770H Setup Manual page 22

Using Your Inspiron Ultra Mobile Device
For more information on the keyboard, see
Dell Technology Guide . Wireless and volume
control keys are also located on the keyboard.
Press <Fn><2> to turn on/off your wireless devices
Press <Fn><3> to view details of your battery status, health, and
to get battery tips
Press <Fn><4> to mute the sound
Press <Fn><5> to turn down the volume
Press <Fn><6> to turn up the volume
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