ModelAD300ProIIWireless Receiver Unit ModeWireless Mode(compatible with Canon E-TTL II, Nikon i-TTL, Sony, OM SYSTEM, Panasonic, Fujifilm, Leica, Pentax)Flash ModeWireless off: M/MultiWireless on: TTL/M/MultiPower (1/1 step)300WsFlash Duration (t=0.1)Normal：1/220s ～ 1/14920sColor：1/220s ～ 1/9090