The Audio-Technica AT8801 Phantom Power is a line-powered device that allows the use of remote-powered microphones with systems that don't provide phantom power. A highly regulated power supply provides constant voltage even with a heavily loaded input. The Audio-Technica AT8801 is nternally protected to prevent overheating and damage due to shorts. The heavily enameled case shields the interior from electrostatic interference. 48V ± 2V DC. Includes AC adapter.