Buy on Amazon : br br YONGNUO YN-622N 1 x TX 2 x RX i-TTL LCD wireless flash controller wireless flash trigger br br 1 When you prepare to upgrade YN-622N-TX first time please download the driver and software package YNTriggerUpdaterzip uncompress it and run YNTriggerUpdaterSetupexe to install the driversoftware br 2 Download the most update firmware package and unzip it br 3 Turn off YN-622N-TX keep pressing mode button and turn on it again The screen will show firmware upgrade interface Connect the device to your PC via a USB cable br 4 Run YNTriggerUpdater from start menu Click on Browse Button and navigate to the firmware you download in step 2 Wait a few seconds until the device is detected Click on Update to begin When is done YN-622N-TX will be reset automatically and you can use the new version now br 5 If any error is encountered when updating please turn off and try again from step 3