Grace Design Felix 2 Instrument Preamp/Blender - Silver Personal Monitoring Systems The battery packs are either

The battery packs are either inserted directly into the charger or remain in their bodypack transmitters/receivers of the 2015 System or the evolution wireless G2 300 and 500 Series

and an array of other sources

Power Requirements 100-240VAC

HAVOC Switch for Oscillation Mode

Grace Design Felix 2 Instrument Preamp/Blender - Silver Personal Monitoring Systems The battery packs are eitherFELiX2 is a studio quality, 2 channel blending acoustic instrument and mic preamp, designed for working musicians, engineers, sound companies or venues looking for the highest quality solution for amplifying stringed instruments. FELiX2 is built into a roadworthy floor unit chassis of anodized aluminum and steel, portable enough to leave the rack at home but bring studio quality to the stage. With the same stunning audio performance and legendary