TT685II-O new upgraded overhead flash, Hearing the users' voices, the TT685II-O upgraded in various aspects while also inheriting all the powerful features of the TT685-O Godox 2.4G Wireless X System: The TT685II-O is also built-in with Godox 2.4G wireless X system to obtain seamless connectivity with compatible flashes or flash triggers TTL/Manual /Multi flash mode: Under TTL mode, all the functions as HSs(up to 1/8000s),FEC, FEB, rear-curtain sync, and so on help you to capture every splendid moment quickly, precisely, and creatively. In manual mode, there are 22 steps of power output from 1/1 to 1/128 for your free adjustment Wide Light Coverage: The TT685II-O has both auto/manual zooms, with flash coverage set to match lens focal lengths from 20-200mm. Combining extreme power with maximum zoom flexibility, the TT685 makes it possible for all different lighting setups and is compatible with a wide variety of lenses Quick-release Lock: The TT685II-O is designed with a quick-release lock to ensure a smooth setup, which helps you capture the next masterpiece in critical moments Godox TT685II-O Flash for Olympus Panasonic TTL Speedlight