1.TTL Autoflash - Xpro-N Flsh Trigger Support TTL Autoflash, 1/8000s High-Speed Sync,Multi flash, Manual Flash, Flash Exposure Compensation, TCM Transform Function, Magnfication Function, One-Shoot & Multi- Shoot Setting, Group Modeling Lamp Control, Group Zooming, Adjusting All Groups' Output Value Simultaneously, etc 2.Multi-Use - Built in 2.4G Wireless X System which allows you to easily trigger and control the flash even 100 meters away.Multi-use: As a wireless Trigger for camera flash,outdoor flash and studio flash; As a Wireless Nikon Speedlites Trigger;As a Wireless Shutter release Trigger;As a flash(without X system) trigger with 2.5mm Sync Cord Jack 3.TTL-Convert-Manual Function > Long Press TCM Button can Transform the Flash Value in TTL Mode into the Power Output Value in M Mode; Short Press TCM Button Enables the Groups to be Switched Between the One-Group and Multi-Group Mode 4.01-99 WIRELESS ID - Only Achieve Triggering when the Channels and Wireless IDs of the Master and Slave unit are Set to the Same, Avoiding Signal Interference effectively