This DB15 manual data switch box can be used to switch between four different PC MAC computers devices sharing one DB15 peripheral device such as game pads,joysticks, MIDI devices, or Macintosh monitors. It can also be used on one computer shared by four DB15 peripheral devices. Connectors are fully shielded for maximum EMI/RFI protection. Heavy-duty dial contorl switch knob. Anti-skid rubber feet. DB15 15 pin connectors. DB15 I/O female x 1 + ABCD port female. Switch box does not require power. Cable may be required sold seperately. Standards: UL, CSA, ISO 9001:2000 manufacturer. *NOTE: this is will NOT fit HD15 VGA (3 row pins) connectors.