If the LED ashes red during ight the
headset will continue to operate. Install new
batteries as soon as possible at any indication
of low batteries.
Battery Types
Use two “AA” alkaline or lithium batteries. Lithium
batteries may provide improved battery life in
colder temperatures. We do not recommend
using re-chargeable batteries or mixing battery
types and brands.
Battery Life
A set of batteries can provide up to 40 hours
of power. However, heavy Bluetooth usage
can signicantly reduce battery life. Under
quiet conditions Sierra will auto shut o
approximately ve minutes after the headset is
removed from your head.
The Controller
A. Power indicator LED: Flashes green when
power is supplied to Sierra and batteries are
strong. Flashes red when batteries are low.
B. Power button: Powers on headset, turning
on Active Noise Reduction (ANR). Press
button once to turn Sierra on; press and
hold to turn Sierra o. To toggle the LED
brightness from bright to dim quickly press
the power button twice.
C. Volume control: Controls audio panel volume
with individual sliders for each ear. Does not
aect the volume of auxiliary devices.
6
Getting Started
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