iSeries Waterproof Sennheiser EW Wireless Mic CaseThe 3i0907-4-SWK Custom interior Sennheiser EW Wireless System Mic case is a very compact case and is part of the iSeries Waterproof cases. The interior features a custom cut polyethylene (PE) foam interior that will accommodate a wireless plug-on transmitter, wireless body pack transmitter, wireless body pack receiver with an extra spot for a lavaliere microphone plus additional accessories with an overall interior measurement of 9" x 7" x 4", compact yet durable to house your delicate wireless system. iSeries injection molded waterproof cases are constructed of ultra high-strength polypropylene copolymer resin and feature a gasketed, waterproof and airtight, submersible design (IP67) that is resistant to corrosion and impact damage. Its molded-in hinge, patented "trigger release" latch system, comfortable, snap-down rubber over-molded cushion grip handle, secure stacking, and automatic ambient pressure equalization valve (MIL-STD-648C) all contribute to its military grade design. SKB's iSeries Injection Molded Mil-Standard Watertight Cases are molded of ultra-high-strength polypropylene copolymer resin, featuring a gasketed, water and dust proof, submersible design (MIL-C-4150J) that is resistant to corrosion and impact damage. The cases include stainless steel molded-in hinges, patented "trigger release" latch system, comfortable, snap-down rubber over-molded cushion grip handle and automatic ambient pressure equalization valve (MIL-STD-648C).