1.If you have a Sony camera, we sincerely recommend this flash trigger. 2.1/8000s High-Speed Sync, Let you feel to catch every moment.Also own 11 Functions ,Extra-large LCD panel, 5 group buttons and 4 function buttons convenient manipulation,Very suitable for novice learning. 3. XPro-S has a total of 16 Groups and 32 Channels,Easy wireless control and triggering.Full Graphic Display of 5 Groups simultaneously .Add 01 to 99 Wireless ID settings,Which Can Only Achieve Triggring When the channels and Wireless IDs of the Master and Slave Unit are Set to the Same,they can effectively avoid signal interference. 4. XPro-S is different from other transmitters in that it has a lot of features.Fully Support TTL Autoflash,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