The PortaBrace MXC-302 Audio Combination Case is the larger of the two mixer cases available for the 302 mixers. Under the mixer area is a battery area for powering the mixer with an NP1 type battery with many of the popular NP-1 (or similar sized) battery brackets. (When you install the mixer, be sure to use the adhesive backed Velcro inside the case for proper fitting). The Mixer Case Combination is a modular case, which can be ganged with many PortaBrace audio recorder cases (AR-series). The modular design gives you the flexibility to change the combination of equipment that each job demands. The case is padded and custom fitted, providing access to switches, cables, batteries, and other important controls while protecting the gear from rain, snow, dust and other damaging forces. The Suede leather shoulder strap and the detachable RM-Multi case are included.