Built-In 2.4GHz X Wireless Radio System Compatible with Canon E-TTL / E-TTL II Guide Number: 197? at ISO 100 and 200mm Zoom Range: 20-200mm (14mm with Panel) Tilts from -7 to 90? Rotates Left & Right 180? Wireless Master/Slave TTL Functionality Recycle Time: 1.5 Seconds at Full Power High-Speed, 1st and 2nd Curtain Sync Runs on Rechargeable Li-Ion Battery Pack
