The MC-21A 10'' Remote Extension Cord from Nikon is an extension cord to lengthen specific remote triggers, such as the Nikon MC-22A, MC-23A, MC-25A, MC-30A, MC-36A and ML-3. The MC-21A adds ten feet extension and is compatible with the following Nikon DSLRs: D3X, D4, D300S, D700, D800, D800E. | Nikon | | 4651 Camera Accessory Black | Best Buy