The Godox TT685O Thinklite TTL Camera Speedlite Flash is a powerful and portable device that makes shooting so much joyful, as it creates even illumination. Designed to mount on Olympus and Panasonic cameras and also supports TTL autoflash. The Godox TT685O Thinklite TTL Flash features a powerful High-Speed Sync of 1/8000s, with a flash coverage of 20 to 200mm; a built-in 2.4G wireless transmission with all-in-one functions and a 100m working range. The device allows you to make use of the Master & Slave Flash which either allows you to use it as a master unit that's capable of triggering Olympus/Panasonic speedlites that can work in TTL/Manual, Multi Flashes off camera flash mode or to receive signals from speedlites and the Godox X1 series flash trigger. Additionally, the speedlite features a dot-matrix LCD panel that offers convenient operation such as changing settings to suit your workflow.