There is one sync cord(ore wireless) from the hotshoe to the flash. The other flashes work either by cords or by light sensors. Set the light(s) up, take a reading or two to get an idea of how the light varies from one side to the other, take a few test shots to see how it pans out in actual shooting..adjust from there. I use foamcore white board for reflectors(and one covered with crinkled aluminum foil) and have found good results from that. I personally am not going to try the second strobe untill I get used to the "single" light source..with reflectors, etc. Then, who knows. We are learning together. : ) Tom.