Compatible Cameras: Type-A EOS cameras (E-TTL II/E-TTL autoflash) & | Type-B EOS cameras (TTL autoflash) | Number of Flashes: Approx. 100-700 flashes. | Dimensions: Approx. 3.10 x 5.64 x 4.83 in./78.7 x 143.2 x 122.7mm | Weight: Approx. 15.34 oz./435g