The AMT BP40 Belt Pack Pre-amp comes standard with:

This belt pack allows the player to be in control of there volume with a volume control located on the top of the belt pack. The BP40 belt pack varries internally for the different systems listed above. It regulates voltage and allows for either use with a 9-Volt battery or phantom power. Except for the AMT HR1 and HR2, all belt packs include a 1/4 inch - XLR cable.