It is clear that the brand product is of little interest given the price proposed for this post. I did not dare open the battery door, sometimes it breaks and wait total wear to test the strength of the studs ... I will not repeat the advantages of remote control, they are widely mentioned in other reviews. A tip on the Nex 5N, everyone seems to complain about not being able to make shots with this remote control, by being face to the camera. Observe that the objective Sony 18-55 is silver and striped, and it reflects very well the infrared beam: aiming it up to 90 ° it work aside and to operate the back, aim for the top unit. You see, with a little practice, this is fine. I do not have optical dark screw top, but then I doubt it reflects enough. Have fun.