The AUDIO RECORDER CASE (AR-7B) is a modular case, which can be ganged with another AR-7, or a Porta Brace mixer case (MXC- models). They can also be connected to any of the modular Radio Mike cases (RM- series) The modular design gives you the flexibility to change the combination of equipment that each job demands. The cases are 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. A shoulder strap and the detachable RM-Multi case are included. (be sure to use the adhesive backed Velcro inside the case for proper fitting). Video: Choosing an Audio Harness For Your Audio Recorder Case