Yong Nuo New 2.4GHz Wireless Remote Control RF-602 C1 for Canon 30/33/50/300/300D/350D (Rebel XT) and 400D/450D/500D/550D/1000D/ Contax N / 645 with 2 Receivers 2.4GHz wireless remote controls The flash sync speed is up to 1/250s its working range is up to 100 meters 4GHz band-16 selectable operating frequencies for eliminating interference A 3.5mm mini phone jack and 6.35mm full size sync jack adapter are provided