This is one of the two electromagnetic cable releases available for the Mamiya 645 AF camera. Cable Release RE401 is 1m (39.7 in.) long and is coiled. Cable release RE 402 is 5m (196.85 in.) long and is straight. Both releases plug into the Remote Release Socket on the side of the camera.
NOTE: It is also possible to use a traditional screw-in, non-electromagnetic cable release with this camera. The receptacle is located on the shutter release button.