Battery types
Use two “AA” alkaline or lithium batteries. Lithium
batteries may provide improved battery life in
colder temperatures. We do not recommend
using rechargeable batteries or mixing battery
types and brands.
Battery life
A set of batteries can provide up to 40 hours
of power. However, heavy usage of Bluetooth
®
wireless technology 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.
D. Bluetooth indicator LED: Flashes blue when
Bluetooth mode is on and red when Bluetooth
6
Getting Started
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