Has some pros: What can I say. In general, I have recently been a supporter of products from the Middle Kingdom. For the first time I was amazed by the quality and price of yongnuo products. I had in my arsenal 2 bright flash 685 in my opinion and led light from the same company. Everything is on top - quality, price, functionality and reliability. But the Chinese do not stand still - and the slightly less popular brand Godox began to step on the heels of yongnuo with leaps and bounds. For the same money, they began to equip their flashes with built-in synchronizers that work in conjunction with godox x1-t triggers. And tt600 is one of the representatives of this family. Manual flash that supports high-speed sync. I am completely satisfied with its functionality. Works flawlessly. Has cons: What can I say. In general, I have recently been a supporter of products from the Middle Kingdom. For the first time I was amazed by the quality and price of yongnuo products. I had in my arsenal 2 bright flash 685 in my opinion and led light from the samecompany. Everything is on top - quality, price, functionality and reliability. But the Chinese do not stand still - and the slightly less popular brand Godox began to step on the heels of yongnuo with leaps and bounds. For the same money, they began to equip their flashes with built-in synchronizers that work incomnjunction with godox x1-t triggers. And tt600 is one of the representatives of this family. Manual flash that supports high-speed sync. I amcompletely satisfied with its functionality. Works flawlessly.