Bid is for a used Tru Spec Model TA 25 amplifier for UHF, VHF, and FM. There is one input jack and one output jack. There are some scrapes and scratches from use. The power light came on when I plugged it in, not tested beyond that. 60Hz, 4.5W. Thanks for looking; please e-mail me with any questions, allowing enough time before the auction ends for an answer.