Yongnuo Rf-603 Ii C3 Radio Wireless Remote Flash Trigger For Canon 50d 40d 7d/7d Mark Ii/6d/6d Mark Ii/5d Mark Iv / Iii /ii 1ds - Shutter Release - AliExpress
Amazon.com : Yongnuo RF-603 II RF603 II 603II Wireless Flash Trigger/Remote N3 (2nd generation of YONGNUO RF-603 N3) : Electronics
Yongnuo RF-603C II C1 Wireless Flash Trigger Kit for Canon 2.5mm Connection