no bigger than a pack of cigarettes. And not much more difficult. The flash always there. Not to compare with a Metz 52nd But significantly better than the built-in flash of the A 6000. In dimly lit living room indirectly flashed from 3-4 meters with a 1: 4 and 50mm Zeiss: 800 ISO, great pictures, very harmonious. What brings a huge flash of is always at home? The ideal solution for traveling. Goes well with eneloops, even better, the xx eneloops (2 AAA)