You
can use the Volume buttons on the
remote control to adjust the volume as you project a presentation
with audio. The volume buttons control the projector’s
internal speaker system
(PowerLite Pro
G6070W/G6170/G6270W/G6470WU/G6570WU/G6770WU) or any external
speakers you connected to the projector.
You must adjust the volume separately for each connected input
source.