Trigmaster II 2.4G makes controlling your strobe and speedlight easier than ever. With a triggering range up to 120 meters and a sync speed up to 1/250s, you’ll be able to shoot efficiently in a variety of conditions. With 16 independent channels, many photographers can work together without interference. Trigmaster II 2.4G also works as a remote shutter for your camera. Both transmitter and receiver use two AAA batteries, giving long battery life.