The Pocket Wizard NM4-P Pre-Trigger Motor Drive Cord connects to the camera's remote cable socket, and enables your Pocket Wizard radio slave SET to trigger the camera's shutter remotely.
This pre-trigger cable is designed to keep the camera constantly "awake", and has the same effect as holding the camera's trigger button pressed down half-way.
A camera will trigger much faster in the "awake" mode, but will also use up more battery power. However, the pre-trigger mode can be switched on or off from the cable itself.
This cable is 3' long, and will trigger Nikon DSLR cameras with the 4-pin remote socket (e.g. D70s (not D70), D80).
Works with any Nikon camera that accepts the Nikon MC-DC1 trigger cord.