CANON Speedlite transmitter for 600EX-RT

Compatible Cameras: Type A EOS cameras (E-TTL II/E-TTL autoflash) | Sync Speed: High-Speed Sync provided (EOS-1D X and EOS 5D Mark III only) | Transmission Range: Approx. 98.4 ft. (30m) | Dimensions: 2.65 (W) x 2.42 (H) x 3.05 (D) in. / 67.4 (W) x 61.5 (H) x 77.4 (D) mm | Weight: 3.9 oz. / 110g (excluding battery)