The MC-23A Connecting Cord from Nikon is a cable that connects two cameras together for simultaneous or synchronized shooting. The cord is 1.3' (39.6 cm) long and compatible with Nikon DSLRs that have a 10-pin remote port such as the D3, D3S, D3X, D4, D200, D300S, D700, and D800. For cameras with different frame rates, each camera will fire to its individual frame rate specification.