Power supply: DC +5V (via USB directly).Fuctions: Read, Write, Copy, Erase, Compare, Save to File, File to Write,.It is an ideal MSR for people who often trave around. This smart design enables it to be smaller and lighter than common MSR. It presents the world's most advanced MSR technology. The communcation with computer and the power supply are both done via one USB cord. MSR X6 is the world's only magnetic stripe card writer without power adapter. MSR X6 USB-Powered Magnetic Stripe Card Reader Writer Encoder For Hi&Lo Co Track 1, 2 & 3 Software for both Windows OS and Mac OS.Full-Version: 3-Tracks, Hi-Co and Lo-Co, Read/Write/Erase.Smallest magnetic card writer in the world!.