The iSeries 3I-1209-4-BH2 Waterproof Case from SKB features a custom foam interior designed to accommodate up to two Sennheiser AVX wireless mic systems, including two EKP XLR receivers, two SK bodypack transmitters, one AVX-835 handheld mic transmitter, and five spare batteries. It also features a large accessory pocket for MKE2 lavalier mics, cables, shoe mounts, and more.