Bundled together by B&H for your convenience the Sound Devices 302 Kit gives you a portable 3-channel field mixer and a corresponding bag. The mixer features mic/line-level I/O, three channels (two of which are stereo-linkable), phantom power, low-cut switches, and more. It's powered by three AA batteries, which you can store in the OR-28 bag.
The OR-28 is able to hold compatible field mixers and recorders, as well as ancillary gear such as transmitters, cabling, and batteries. It sports an internal honeycomb frame and a sliding, secure buckle system for keeping your equipment in order. The bag is accessible from six directions.