Siros L - cordless, compact, fast and powerful The Siros L is broncolor's new battery-powered compact device, which provides ambitious professional photographers with the opportunity to enjoy the perfect lighting, be this in a mobile form in the studio or for external shots - offering up to 440 flashes at full power per battery charge, color constancy and both very fast and also long, flash durations. Easy to control with the bronControl App. Available in 400 and 800 Joules. Siros L features broncolor Hs for syncing at shutter speeds up to 1/8000s. broncolor Hs requires an RFS2.2 transmitter, available for Canon, Nikon, and Sony cameras.