Zomei ZM860T LCD Display TTL Speedlite Speedlight Flash for Canon & Nikon DSLR Cameras- Automatic Flash Compatible with all Canon DSLRs: EOS 1D X, EOS 5D Mark III, EOS 5D Mark II, EOS 6D, EOS 7D Mark II, EOS 7D, EOS 70D, EOS 60D, EOS Rebel T5i (700D), EOS Rebel T3i (600D), EOS Rebel T2i (550D), Nikon DSLRs: D3X, D3, D4S, D4, Df, D810, D800, D750, D700, D610, D7500, D7300, D7200, D3300, D3200, etc Supports Canon & Nikon wireless S1&S2 modes; manual zooming, front-curtain synchronization, PC port 8 levels of output control & 22 levels of fine tuning; features a maximum guide number of 58 at ISO 100; covers a focal length range of 24mm to 105mm to suit various photography needs Powered by 4 AA batteries; it takes only 2.9 seconds for the flash to be fully charged after a full-level output; battery life: 100-1500 flashes For protection in continuous flashes, to prevent the flash head from getting too hot and damage, please do not flash over 20 times when in power lever 1/2,1/1.