Let the St-E10 Speedlite Transmitter revolutionize your photography experience. This advanced tool is designed for wireless Speedlite setups that require one or more off-camera flashes, offering seamless compatibility with Eos cameras equipped with the multi-function shoe. Unlike its predecessors, the St-E10 Speedlite Transmitter maintains a digital connection to the camera through the shoe, eliminating the need for batteries. This innovative feature results in a design that is approximately 30% smaller and 50% lighter than the St-E3-rt Ii, making it a more portable and convenient option for photographers on the go.The St-E10 Speedlite Transmitter offers effortless control over 5 independent groups across 15 Speedlites. Adjusting settings is as simple as pressing the menu button on the transmitter and using the vari-angle touchscreen on the back of your camera.