The Behringer PS400 is a compact, single-channel phantom power supply for condenser microphones that don't get power from a mixer or interface. It provides selectable +12V or +48V output via XLR input and thru connectors, so a mic can be plugged straight in and then routed on to a mixer. It runs off an included 12V DC adapter and has an LED to indicate when it's powered on, making it a small, portable fix for phantom power on location recordings or gigs.