"Specification: 1.Type: airborne Speedlite E-TTL II/E-TTL/TTL Auto Flash 2.Compatiable camera: A Type EOS cameras (E-TTL II/E-TTL Auto Flash) B Type EOS camera(TTL Auto Flash) 3.Guide number:58/190(at 105mm focal length,ISO 100 in meters/feet) 4.Flash coverage:24-105mm(14mm with wide panel) 5.Flash duration:1/1050s (under output 1/1) 6.Flash recycling:0.5¡«5 sec 7.Wireless transmission rang(Approx.):Indoors:12-15m/ 39.4-49.2ft. outdoors:8-10 m/26.2-32.8 ft. 8.Reception angle:40¡ãhorizontal,30¡ãvertical 9.Assist light effective rang:0.6-5m/2.0-16.4 ft. 10.External power:CP-E4 11.Internal power:4 x size-AA alkaline batteries Size -AA Ni-MH and Lithium batteries also usable 12.Battery life:100-700 flashes(with size -AA alkaline batteries) 13.Size£º76 x 137 x 117 mm/ 3.0 x 5.4 x 4.6 ft 14.Weight:Approx. 380g(excluding batteries,only flash) 15.Power saving:power saving after certain period of idle operation approx 4 min. Package Included : 1 x FLASH Pouch 1 X Flash Diffuser 1 x Flash Stand 1 x Protecting Bag 1 x User Manual * High-performance TTL Electronic flash, Completely compatible with Canon ETTL system* TTL flash、Manual flash、Multi flash * LCD backlight Panel * Recycling Time：3s* Flash number：GN 50 * Support Canon wireless flash system* Support wireless 【M】gourp SET flash Output * Support camera bome light / wireless TTL exposure lock* Support front-curtain sync,Rear-cutain sync* TTL Automatic exposure ，exposure compensation -3.0EV to +3.0EV* Temperature measurement* Locking pin* Low Battery indication"