1. Volume Dial: Rotate to increase and decrease the
volume level.
2. Power Button: Slide this button to turn the
headphone ON/OFF.
3. Battery Compartment: Slide cover open to access
the batteries.
4. Adjuster Bar: Slide this bar up/down to adjust the
headphone fit.
Headphone Operations Manual
Model: HP-400
Installing the Batteries:
To install the “AAA” batteries supplied, follow this
procedure:
A. Hold the headphones in one hand and place
your thumb onto the gripping arrow on the
battery holder cover.
B. Press down on the gripping arrow while sliding
the door away from the headphones to expose
the battery compartment.
C. While observing the battery polarity, place the
batteries into their compartment.
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