I was looking for a capable flash for Micro4 / 3, which can be anything that the Olympus FL-600R own, but is cheaper. Although there have been some, but for me the critical point was the wireless slave capability in TTL mode with my Oly E-M10. Now, this model of Nissin can, according to the specifications and operating instructions, which can be downloaded from the Internet. I decided then to buy. Having tried the unit now, I am not disappointed. First: the device can wirelessly slave in TTL mode with the actual e-M10. So you can run a small studio-like structure with multiple flash units. The device makes a high impression, is relatively small for the performance offered and therefore well-suited to Micro4 / 3 cameras. There's no LCD screen to display setting, you also do not miss this. The setting with 2 wheel with "click stops" and illuminated reference points are perfectly adequate in practice, even in low light. The included accessories are complete (flash foot with tripod socket, diffuser cap for softer light and soft fabric bag), the built-in capabilities allow nothing to be desired (Swivel-mounted head, LED video light (can be used as a primitive modeling), wide angle diffuser, pull Aufhellreflektor, synchronization for high shutter speeds, manual, auto and TTL mode directly and as a slave. On the device I've nothing to complain about, I even bought myself a second. What I find rather impractical, the rectangular fabric bag. The flash is housed therein in its L-shaped normal position, under the L, the diffuser cap is housed. In a camera bag this package takes up the volume of a thicker, short zoom lens. Rather uneconomical! But you can put the diffuser cap, put the head vertically and then you have a flat Z-shaped structure, a lot of flat for transport, as the original packaging. One can to buy a cheap cloth bag for protection.