I bought the set before about 9 months because it can relay a FP High-Speed Sync via radio what else offers only the Pixel King. This works very poorly, always failures and since yesterday it no longer and in the receiver has probably inside some solved anything works because it rattles there. I have used it a maximum of 5x, it's never fallen down, was never in outdoor use but was safely in my closet. So I can not recommend the radio.
