Specification Binding : Electronics Brand : Vello Label : Vello Manufacturer : Vello Model : 4331967047 PartNumber : VCTTL-CRK ProductGroup : Photography ProductTypeName : CAMERA_OTHER_ACCESSORIES Publisher : Vello SmallImage_Height : 75 SmallImage_URL : http://ecx.images-amazon.com/images/I/51R3OcbLPPL._SL75_.jpg SmallImage_Width : 75 Studio : Vello Title : Vello FreeWave Captain Wireless TTL Triggering System Kit with Additional Receiver for Canon E-TTL/E-TTL II Cameras