The YN560 IV is the latest update in the very popular YN-560 series of manual flash units. The YN560 IV now adding a master mode, or effectively a YN560-TX radio transmitter unit built into the flash (in addition to the remote manual radio receiver already built into the current YN-560 III).

The YN560 IV master flash can control the remote manual flash power, and flash zoom length, of 3 individual groups of remote YN-560 III and YN560 IV flashes (while the YN560-TX has the extra ability to control up to 6 individual groups).

Like the current YN-560 III, the new YN560 IV flash has the remote manual radio slave built in as well, which can be controlled by other YN560 IV, YN560-TX, or simply fired by RF-603 II, RF-603, and RF-602 manual radio triggers

YN560IV 2.4GHz Speedlite:

• Wireless Transceiver Integrated
• Fantastic with Three Controlling Groups 2.4GHz Speedlite 560 IV
• Supports Wireless Master Function
• The 560 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.
• Supports Wireless Slave Function
• Multiple Trigger Synchronous Mode Supported
  Settings Save Automatically, Supports Custom Settings. The parameters on the flash will automatically save when the flash turned off; the users can customize setting the flash function as needed.

• Support Electric Zooming Function
  The flash coverage can be altered between 24~105mm through the [ZOOM] button.
• 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.
• Ultrafast Charging Recycle System, Supports External Power Supply
• Equipped with Big Size LCD Display Screen, Standard PC Synchronous Interface
• Including: 1 x 560 IV
• High Guide Number 2.4G wireless speedlite, supports M/Multi/-- mode.