This remote control device is designed for use with the Nikon F5, F100, F90X, F90, D1-Series or Multifunction Battery Pack MB-D100 attached to the D100. By using Adaptor Cord MC-26, the MC-20 can also be connected to a Nikon F70, F4S & F4E (other than F4), F-801/F-801s, F-501 or F-301 camera, Nikon Motor Drive MD-4 attached to a Nikon F3-Series camera, or MD-12 attached to an FM2/FM3A camera. It enables you to perform remote control operations away from the camera. In addition to normal shooting, you can perform long-time exposure with the long-time exposure mode. Also, when time mode is selected, the shutter opens and the time exposure begins with the first press of the shutter release button, and the shutter closes and the time exposure is terminated with the second press of the shutter release button. During time mode, the exposure time is displayed on the LCD panel.