I have no reason not to rate this offer 5 stars. I was trying my hand at product photography and needed a third light to control from my YN622n TX. I have SB 800 and YN568EX on 2 YN622 TX. The transceiver for this flash is built in. Unlike my other Yongnuo flashes, the menu system on this model feels intuitive. The assembly latch and lock is a great addition too! Using a detachable shade, a built-in radio transmitter allows for more central placement of the light. The flash seems to work very well without the use of modifiers. Update: I should point out that I am not a professional working with this light. I doubt I've fired it 100 times a day, I've never used a second set of batteries or an external power supply. I think the light might be a little cold. But this weekend I was amazed at the range of this flashlight.