Comes with a 1-year warranty Integrated 2.4GHz X wireless radio system Works seamlessly with Canon E-TTL / E-TTL II Guide number: 197 at ISO 100 and 200mm Zoom range: 20-200mm, extendable to 14mm Tilts from -7 to 90 degrees Rotates 180 degrees left and right Wireless TTL master/slave functionality Recycle time: 1.5 seconds at full power High-speed sync, including 1st and 2nd curtain Powered by a rechargeable Li-ion battery pack Built-in 2.4GHz X wireless radio system Compatible with Canon E-TTL / E-TTL II Guide number: 197-feet at ISO 100 and 200mm Zoom range: 20-200mm (14mm with panel) Tilts from -7 to 90 degrees Rotates left & right 180-degree Wireless master/slave TTL functionality Recycle time: 1.5 seconds at full power High-speed, 1st and 2nd curtain sync Runs on a rechargeable Li-Ion battery pack