Guide Number: 33m (ISO 100@50mm) - Dedication: Sony ADI/PTTL system - Focal range: 28~85mm (35mm equivalent) - Flash time: 1/700 sec (with enough power) - Maxinum exposure ratio: 09~17m/3.0~56 feet (F2.0) - Infrared assist focusing: 0.9~8m/3.0~26 feet - Vertical Rotation Angle: 30-45-60-75-90 degrees - Horizontal: left:60-75-90-120-150-180 degrees / right:60-75-90-120-150 degrees - Auto check indicator / Auto restart / 3 min auto standby / TTL / Low voltage trigger - Support Sony hotshoe cameras 900 / A700 / A850 / A550 / A500 / A380 / A350 / A330 / A300 / A230 / A200 / A100 - Direct hotshoe contact mount flash with Dynax ADI for Sony Alpha DSLR camera - Powered by 4 x AA batteries (not included) - Chinese/English manual included