Main Features:
●Supports Wireless Master Function
YN - 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 YN-560 IV and YN-560 III
●Supports Wireless Slave Function, fully supports YN560 - TX, RF - 603 II RF - 602 Wireless Transmitter
One YN - 560 IV can receive the wireless signal from YN560 IV, YN560 - TX, RF-603 II and RF - 602, with optical 16 channels
When YN - 560 IV and YN560-TX used as transmitter, it can realize remote control and parameter settings
●Supports Multiple Trigger Synchronous Mode 
It can be triggered through the flash mounted on the camera, 2.4G wireless triggering system, S1 and S2 pre flash cancel mode
●Supports setting save automatically, custom settings ( fn )
The setting can be save while powered off
● GN58 at ISO100, 105mm: high frequency 2.4G wireless speedlite, support M / Multi mode
● Supports ultra-fast charging recycle system, and support external power supply
● Support zooming between 24 - 105mm
● Large LCD screen for viewing settings and making adjustments

Specifications:
Flash index: 58 ( IS0100, 105mm )
Flash mode: M, Multi
Trigger mode: set top, TX, RX, S1, S2
Lamp zoom range: 24, 28, 35, 50, 70, 80, 105mm
Up and down rotation angle: 7 - 90 degrees
Left and right rotation angle: 0 - 270 degrees
Power supply: 4 x AA alkaline or 4 x AA Ni-MH ( not included )
Number of times of illumination: 100 - 1500 times ( using A alkaline manganese battery )
Callback time: about 3 seconds ( using AA alkaline manganese battery )
Color temperature: 5600k
Flash time: 1/200 seconds to 1/20,000 seconds
Flash control: 8-level brightness control ( 1/128 - 1/1), a total of 29 fine-tuning levels
External interface: hot shoe, PC port, external charging interface
Wireless trigger distance: photosensitive flashing distance is 20 - 25 meters indoors and 10 - 15 meters outdoor, 2.4G radio flashing distance is up to 100 meters