The US221A is a 2-port USB 2. 0 Peripheral Switch that allows up to 2 computers to share the use of a single USB peripheral device (such as a printer, scanner, mass storage drive, etc.) on a one-at-a-time basis. The peripheral focus can be given to a computer manually by using pushbuttons on the switch, using the software-based configuration utility, or by the Auto Switch function. With multifunction printer support, the US221A is the ideal way to share the USB 2. 0 peripherals in a multimedia office environment.