Attaching the P-4500 to a compatible Epson printer via USB 2.0, high quality photographs can be printed directly, without the need for the PC "middle man". It's all under your total control simply select the photographs to be printed, and then print wherever and whenever you want. And for those times when direct connection to the Windows or Macintosh PC for image transfer is required, then the P-4500's USB connectivity makes it all incredibly easy... and fast!