Thinklite TTL Flash for Canon Godox TT685C II Important Features Canon E-TTL / E-TTL II Compatible Built-in 2.4 GHz X Wireless Radio System Guide Number: 197' at ISO 100 Range of Zoom: 20–200 mm Wirelessly rotates horizontally to 330° and tilts from -7 to 120°. Master/Slave TTL Capabilities Time Spent Recycling: 0.1-2.6 Seconds Fast, First and Second Curtain Sync Uses four AA batteries to operate ISO 100 Specification Guide Number 196.85' / 60 m Coverage Complete-Frame, 20–200 mm Bounce Head Yes Auto Zoom Head -7 to +120° 330° Swivel Head Duration of Flash: 1/300 to 1/20000 seconds 0.1 to 2.6 seconds is the approximate recycle time. Control of Exposure Canon E-TTL and E-TTL II TTL through Different Commander Flash Modes Fast Sync Second-Curtain Sync Range of Power: 1/1 to 1/128 -3 to +3 Flash Compensation