With a built-in 2.4GHz radio system and full support for Sony ADI/PTL, including high-speed sync, the small Godox TT350S Mini Thinklite TTL Flash is a great everyday companion for your camera. The lightweight TT350S is useful for both on- and off-camera operation, with a guide number of 118' at ISO 100 and 105mm. In addition to using it as a radio TTL master/slave unit, users can also use it as an optical slave. With its 270° rotation and -7° to 90° tilt, it is also incredibly adaptable. Important Features Integrated X Wireless Radio System at 2.4GHz Sony ADI/PTL Guide Number: 118' at ISO 100 and 105mm compatible Zoom Range: 14mm with Panel, 24-105mm