An updated version of the V1, the V1 Pro is a powerful Lithium-ion battery-powered Round-Head TTL Speedlite, which features a revolutionary round flash head, instead of the traditional Rectangular-shape. The V1 Pro's round flash head enables it to produce smooth-gradated lighting, with natural-looking fall-off, and more pleasing results. New features include a High-Capacity Rechargeable Lithium-ion Battery with Type-C port and improved battery life, SU-1 Bounce & Fill Front Flash attachment, Upgraded Thermal Protection against overheating and more!