Sennheiser K6 Powering Module for K6 Series CapsulesThe K6 Microphone System Powering Module by Sennheiser is the compatible base for many modular capsules. It features high output levels with low noise, a switchable bass roll off, and transformerless balanced output. The K6 can operate on a single AA battery (not included) or Phantom power. Its on off switch also has a battery test position, so you can be sure you have enough juice. The K6's anodized matte black finish will resist abrasions to