- YN560 IV=YN560III+YN560-TX, Supports Wireless Master Function.
- Supports Wireless Slave Function, fully supports YN560-TX, RF-603 II RF-602 Wireless Transmitter.
- Supports Multiple Trigger Synchronous Mode.
- Supports setting save automatically, custom settings ( fn ).
- Supports ultra-fast charging recycle system, External power supply.
Trouble shooting steps: -User need to do setting on Camera Flash light Control Menu to allow out-put flash light. -Long press button or examine if the battery in right position.
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