Flash of good construction, identical to the Canon but for a much lower price without sacrificing on the altar of the quality and effectiveness. I made when received a hundred photos and ETTL manual. Results ==> zero waste all successful with proper expo. The only downside, but it is known and the Canon is identical; they have no higth Speed mode. For this there is the Canon EX MT24, but there ... we change register prices !! Conclusion: it has much value for money! that's good!