Acer P7605 - Manual (Page 44)

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Audio
Note: Functions vary depending on model definition.
Volume
• Press to decrease the volume.
• Press to increase the volume.
Mute • Choose "On" to mute the volume.
• Choose "Off" to restore the volume.
Power On/Off Volume Select this function to adjust the notification volume when
turning the projector on/off.
Alarm Volume Select this function to adjust the volume of any warning
notifications.