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 feet 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.