It is necessary to keep the strobe away from the camera for serious lighting. Even if you want to use a large strobe, many entry-SLR do not have a crucial sync contact. By attaching this product to your camera's hot shoe (common shapes) you can connect the synchronized strobe. Operates with manual lighting or external light auto. A 2-way type with a hot shoe on the top of the main unit with a 0.1-inch (3.5 mm) jack and a locking screw on the mounting foot.