This USB manual data switch box can be used to switch between four different PC MAC computers devices sharing one USB peripheral device, such as a printer, scanner or digital camera. It can also be used on one computer shared by two USB peripheral devices. Connectors are fully shielded for maximum EMI/RFI protection. Push button switch. Anti-skid rubber feet. USB type A to 2 USB type B connectors. USB type A I/O Female x 1 USB type B ABCD port Female. USB 2.0 spec. Switch box does not require power. Cable may be required sold seperately. Standards: UL, CSA, ISO 9001:2000 manufacturer.