Thank you for viewing! S-phantom +48V Phantom Power Supply Unit Includes genuine AC adapter A unit that supplies phantom power to condenser microphones. Used a few times about 3 years ago. I have confirmed that the power turns on. Since I have not tested the operation for this listing, it is being sold as is. Please understand and agree that this is a long-term storage item from my home before purchasing. There are no smokers or pets in my family. I will wrap it in bubble wrap and ship it in a recycled cardboard box. Thank you!