Great for the price, very nice finish. Qualitative product. I installed it and it worked the first cost. Very intuitive in operation. E-TTL and more. Immediately recognized by my 6D which is self-set. Quite possibly the best value in wireless now triggers. Thank you, but is beginning to be accustomed to Amazon of course to make us enjoy unbelievable prices through very efficient and responsible sellers, in my case Cyber trend. Dark head dropped on this product!