Supports Canon"s E-TTL and E-TTL II | Guide Number: 164" at ISO 100 & 50mm | Auto/Manual 24-180mm Stepless Zoom Head * Adjustable Tilt & Swivel Head | 2.0" Rear Backlit LCD Display | 8x Manual Levels: Full to 1/128 Power * AF Assist for Low-Light Photography | Wireless Optical Slave | HV Port for External Power Connection * Built-In Reflector & Diffuser * Whats In The Box: 12" PC Sync Cord, Soft Case, Flash Mount Stand, Limited 1-Year Warranty