The Denecke PS-1A is a portable, single-channel low noise 48V phantom power supply, for field or studio use with a variety of condenser microphones. One XLR Female & one XLR Male connector. The unit operates off of a single 9V battery, with a power reservoir capable of supporting higher current microphones. This small, lightweight and rugged unit offers a long battery life and a bright LED low battery indicator, ensuring proper power and consistent levels during recording. Battery life (mic load dependent) from 8 to 76 hrs., easy-access drop-in compartment for quick battery change. External power jack.