I have not Had a real opportunity to put thesis bad boys to work at least aim They do just that! Took me about 15 minutes to set everything up, unbox, do the smell test, could Some batteries in, mount the flash Because I bought two pairs in order to use one as a transmitter and the others as receivers. I have two and a 430 EX II flash units 60D (just ordered a 6D) and everything functioned flawlessly. For an inexpensive wireless trigger set up the Yongnuo's sccm good.