YN560 IV Universal Speedlite – On-Camera Master/Slave Flash for Canon 7D 60D 500D 1100D 5d Mark, Pentax; Compatible with YN560 III

Electric zoom and ultra-fast recycle: The flash head zooms between 24-105mm by pressing the [ZOOM] button, and features an Ultrafast Charging Recycle System for quicker readiness. Power and customization: Includes a charging socket to connect an external power pack for faster recycling; all parameter settings are automatically saved when the unit is turned off, and users can customize flash functions to suit their needs. Master and slave wireless control: As a master unit, the YN560 IV provides 3 independent groups with full control over flash mode, flash output and focal length for both the YN560 IV and YN560 III. In slave mode it fully supports YN560-TX, RF-603(I/II), RF-602 wireless transmitters. Audible status alerts: When the sound prompt system is enabled, selectable sound modes signal different operating states of the speedlite so you can concentrate on shooting (sound can be turned off). Trigger modes and guide number: GN58 at ISO100,105mm high guide number; 2.4G wireless flash supporting M/Multi mode. Can be triggered by the camera set-top or by a 2.4G wireless trigger. S1 and S2 are sensitive trigger modes, with S2 operating in a pre-flash-canceled mode.