... One Year Warranty Flash Speedlite TR980C For Canon EOS Camera 5D II III Circuit Desing:Insulated ... Remote sensing CELL 2 mode for off-camera TTL flash sync.Increase the external power ... is the rear-curtain sync function.Compatible with:Compatible camera models: Canon EOS 1100D, 1000D, 600D, 550D, 500D, ... 450D, 400D, 350D, 300D, 60D, 50D, 40D, 30D, 20D, 10D, ...