The yn-568ex ii is yongnuo's first ttl master flashsupports high-speed sync flash with high-speed sync (fp flash), the yn568ex ii can synchronize with all shutter speeds. The maximum shutter synchronous speed is up to 18000high guide number, ttl and high speed sync: gn58@ iso100, 105mm; which reaches the level of the mainstream hot shoe flashes, supports hss, ttlmmulti mode.Multiple trigger mode supported: the yn568ex ii can be triggered by the camera set-top, built-in or main-controlled flashing command, s1 and s2 (pre-flash-canceled mode). Compatibility:wireless ttl slave mode: canon 5diii, 6d, 7d, 60d, 600d, 650d, yongnuo st-e2, canon 580ex ii, nikon sb-900, sb-800, sb-700, commander su-800, camera with cls i-ttl system:d4, d3x, d3s, d3, d2x, d700, d300s, d300, d200, d7000, d90, d80hot shoe ttl mode: canon 1dx, 1ds series, 1d series, 5diii, 5dii, 5d, 6d, 7d, 650dt4i, 600dt3i, 550dt2i, 500dt1i, 450dxsi, 400dxti, 1100d, 1000d, 60d, 50d, 40dnot compatible with 20d, 30d package:1 x yn-568ex ii for canon flash unit1 x diffuser cap1 x protection bag1 x mini stand