The Sound Devices CS-3 Production Case is designed and built by CamRade to carry the 302 field mixer, series 7 audio recorders or MixPre mixers. It is intended to be used while operating the device. The CS-3 holds the mixer or recorder with any sized removable battery. Its full-sized front pocket is holds up to three wireless transmitter/receivers. It can also accommodate Porta Brace RM-series accessories on its front or can be mounted to the front of Sound Devices CS-4W (442 Mixer) bag.