This is a Sure Star industrial graded TC-2U40 400W ATX switching power supply for the 2U rackmount chassis. It has a dual fan cooling system, triple circuit protections and PCD options. The TC-2U40 offers unswerving performance for your 2U chassis. This power supply was originally installed in a new system that was scrapped or recycled before it was put into service. We have removed it and repackaged it for individual sale. It comes as pictured and does not come with any additional parts or accessories.