*Supports Wireless Master Function The YN560 IV can be used as master unit, provides 3 independent groups with controlling ability, realizing remote control the flash mode, flash output and focal length of the YN560 IV and YN560 III.
*Multiple Trigger Synchronous Mode Supported The YN560 IV can triggered through the set top of the camera, 2.4G wireless triggering, S1 and S2 pre flash cancel mode.
*GN58 @ ISO100,105mm High Guide Number 2.4G wireless speedlite, supports M/Multi/-- mode.
*Sound Prompting System When the sound prompting system is enabled, the different sound ways will prompt different operating state of the flash so as to allow you focus on shooting.