The Impact Sync Cord Male PC to Sub Mini is an 18" (45 cm) cable. It features a sub-mini plug at one end, and a male PC (post connection) plug at the other end. This allows radio remote control receivers (e.g. MicroSync Receiver) to be connected to the Canon 580EX II or Nikon SB-26, SB-28, SB-80, SB-800, and SB-900 flashes for remote triggering. It can also be used with lightmeters, which usually use a PC male cord. In addition, it can be used to trigger small flash units like Morris or SP brands from the camera.