This is a complete replacement power supply module for t he Amp Supply Company LK-series of amplifiers (LK-450, LK-500, LK-550 and LK-800). Then, please send it back within 7 days upon date of receipt. We are professional online trader with excellent customer services. Our team is working everyday to communicate with our customers and to bring the latest products for your selection.This item is in the category "Consumer Electronics\Radio Communication\Ham, Amateur Radio\Ham Radio Transceivers". The seller is "radioshackus" and is located in this country: HK. This item can be shipped worldwide.