The Sennheiser K 6CL is a version of the well-known Sennheiser K 6 power module with an output signal that is attenuated by 14 dB. The power adapter is the heart of your Sennheiser K 6 modular microphone system.
The AKG B48 L is a mobile phantom power supply that is powered by two AA batteries. It is equipped with XLR as well as mini-XLR connectors, so you can also use it as a reducing adapter! It lasts up to 20 hours on a set of batteries.
Condenser microphones require phantom power, but not all microphones operate at the same voltage. Most microphones, however, work perfectly at 48 Volt, which is why the Phantom II Pro is set for that voltage.