Photographers always eager to try different types of shooting skills. After go through the process of using natural light, they then goal for light which is controllable as well.
Start with a decent profile picture is good enough to feel the different. No need to be fancy at the beginning. So, we introduce the i600. There are Auto, TTL & M modes. Except for on-camera, you can also make use of optical slave with your existing flash model.
Press Release and Specs (google translated)