YNE3-RX receiver is compatible with the Canon RT radio system,so non RT speedlite like canon 580EX II or YongNuo YN-568EXII can now act as RT compatible slave flashes when using the canon ST-E3-RT/YN-E3-RT,or YN600EX-RT or 600EX-RT as transmitter.
The compatible transmitter(master unit):YN-E3-RT/YN600EX-RT/ST-E3-RT/600EX-RTParts of the compatible E-TTL flash list:Canon 600EX(RT)/580EXII/430EXII Yongnuo YN568EX(II)/YN565C/YN468C(II)/YN467C(II)/YN465C
Package included:1*YNE3-RX RECEIVER/1*manual book in Chinese and English.