YONGNUO Infrared Remote Controls ML-3A N1 Detailed Product Description YONG NUO Infrared Remote Control set to achieve the fellowing feature Modulite Remote Control set can accomplish long-range shooting The Remote Control Maximum effective range is 8m The Remote Control Maximum effective shutter release can be accomplished directly from the transmitter About Single frame shooting (S) and Continuous frame shooting (C ) Remote Control to achieve the same with self-timer made shooting Shutter release approximately three seconds after you press the transmission button Taking souvenir photographs on ways to take the delay (DELAY) Facilitate shotting small animals such as the automatic trigger for shooting The shutter is released without pressing the transmission button when the subject crosses the point between the transmitter and the receiver which manually focuses in advance using the auto trigger funcition This is especially convenient when you want to take a picture ,for example. of a small animal that is sensitive to human presence Auto trigger function( A.TRIG) Compatible to : Nikon D200 ,D2H ,D1X ,D1, D2X Nikon F5,F6 ,F100,F90X ,Kodak DSC-14N