PC-Doctor, Inc. sent us their Service Center 6 for review. A toolkit complete with the following items - PCI POST card, 128MB USB storage device, power supply tester, multipurpose USB device, test CD and DVD, audio loopback test device, parallel loopback test device, serial loopback test device, game port loopback test device, and a RJ45 Ethernet loopback test device. All packed in an attractive carry-all case complete with pockets for kit components and space for your tools.