YONGNUO YN-560IV Wireless Flash Speedlite for Nikon Canon Pentax Olympus RF602 About the product 1. Support 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. 2. Support Wireless Slave Function, fully support YN560-TX, RF-603(III), RF-602 wireless transmitter - One YN560 IV can respectively receive the wireless signal from YN560 IV YN560-TX RF-603 (III) RF-602, with optional 16 channels; when the YN560 IV and YN560-TX used as transmitter, it can realize remote control the parameter settings. 3. 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. 4. Settings Save Automatically, Support Custom Settings (Fn) - The parameters on the flash will automatically save when the flash turned off; the users can customize setting the flash function as needed. 5. GN58 @ ISO100, 105mm - High Guide Number 2.4G wireless speedlight support MMulti mode. 6. 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. 7. Support Electric Zooming Function - The flash coverage can be altered between 24-105mm through the [ZOOM] button. 8. Ultrafast Charging Recycle System, Support External Power Supply 9. Equipped with Big Size LCD Display Screen, Standard PC Synchronous Interface 10. Suitable for: Any Standard Hot Shoe DSLR Camera, such as Canon, Nikon, Pentax, Olympus, and so on.