Yongnuo RF-602RX 2.4GHz wireless flash receiver for Nikon SB-900, SB-800, Canon 580EX II, Pentax AF-540 FGZ, Olympus FL-50, Yongnuo YN460, YN468, YN560 etc. (Electronic devices)
I already had a pair transceiver 602 and I needed two complementary receiver to control three flashes in total. Everything is perfectly functional, and attractive price given the competition.