This is the upgrade trigger on Godox X1TS. The large display alone is a reason to buy! I've had it for a few days and here are some observations: ProLarge zoom displays for individual group display and TCM settings work great with the Sony A7II and A7rII cameras (Win)! The individually labeled button for the modeling light is so practical! The display's intensity and backlight work great in bright sunlight. I tested it today and never had to cloud my eyes to see. The Xpro-S autofocus lamp does not work with the Sony A7II or A7rII. Works with old X1TS with the latest firmware, so hopefully Godox will fix this in a future firmware update.