Interfit S1 AC Battery Powered HSS TTL Flash

 Interfit S1, the first AC & Battery Powered HSS TTL Flash

The Interfit S1 is the first and the only one studio head flash monolight with TTL – HSS to include the TTL and HSS technology together, battery-powered but also including AC Power adapter, so practically can be used on both, battery and in the studio on main power source.