The Speedlite AD560 IV With Remote Flash Trigger is a high-quality flash lighting accessory designed for photographers. This remote flash trigger is compatible with a universal fit to ensure versatility in use. The proprietary slave/flash connection allows for easy setup and activation, making it a convenient option for those looking to enhance their lighting studio setups. The flash-activated feature provides precise control over lighting effects, making it an essential tool for photographers seeking professional-level lighting solutions. I dont think ive ever used this! Grab a bargain its half price plus free post Any questions pls ask