2.4 GHz Wireless Radio Transmission Compatible with Canon E-TTL / E-TTL II Guide Number: 197' at ISO 100 and 200mm Zoom Range: 20 - 200 mm (14 mm with Panel) Tilts from -7 to +90 degree Rotates Left & Right 180 degree 1.1 - 1.5X Improved Continuous Shooting High-Speed, 1st & 2nd Curtain Sync Bounce Adapter & Hard Color Filters Runs on 4 AA Batteries