Eliminates the need to connect camera to studio flash equipment with a long sync cord that sometimes isn't long enough. This trigger mounts on camera's hot shoe and fires slaved flash units without adding visible light, so exposure and your lighting arrangement is unaffected. Wide-angle dome on front of transmitter blocks nearly all visible light while allowing infrared to pass through. Since slave sensors are sensitive to both infrared and visible light, they fire in perfect sync with the transmitter and camera. Recycles in only 2 seconds to keep up with fast-paced studio sessions. Ideal for 35mm and digital cameras that have either a hot shoe or a PC sync cord terminal. Includes PC cord for off-camera connection.