Note: The red plastic ring on this product is designed to be removable. You can easily remove this ring and replace it with a standard universal iron or magnetic ring (sold separately) to suit your specific needs. Note: When replacing parts, please make sure that the replacement components meet relevant quality standards to ensure the functionality and safety of the product. | Compatible with: The Godox V1Pro-CU Compatible with Canon Cameras with TTL autoflash. Compatible with Canon 1DX, 5D Mark III, 5D Mark II, 6D, 7D, 60D, 50D, 40D, 30D, 650D, 600D, 550D, 500D, 450D, 400D Digital, 1100D, 1000D, 5D Mark IV, 7D Mark II, 6D Mark II, 760D, 750D, 70D, 80D, 800D, 77D, M5, M3, M50, EOS R, 1500D, 3000D, 5D II, 5D III, RP, 90D | Up to 100 times Full-power Continuous Flashing: Godox V1Pro-CU has made a technological breakthrough, which has increased the continuous flashing times of full power to 100 times, giving more possibilities for creation, allowing you to give full play to your creativity and capture every exciting moment | Detachable Sub Flash SU-1: The V1Pro-CU is creatively designed with a detachable secondary flash SU-1, which is compact and easy to install. With 22 adjustable flash powers in total, it effectively enhances the fill-in effect for portrait shooting and other scenes | Multiple charging methods: Through the new Li-ion Battery design, charge up at ease with the Type-C port or the original VC26 charger. The Charging dock and battery also compatible with V1 | One-Click TTL/M Switch: V1Pro-CU can quickly switch between TTL automatic flash mode and M manual flash mode by one-click, saying goodbye to tedious operation and flexibly adapting to various scenes | Excellent light effects: Distributing even light from center to edge, providing natural and beautiful light effect. V1Pro-CU Round flash head's light effect is softer and more even | Support TTL Functions: Build-in 2.4G Wireless X System, support TTL autoflash, Manual Flash, 1/8000s High-speed sync, Flash Exposure Compensation, Flash Exposure Lock, Second Curtain Sync, Modeling flash, etc | Noted: 1. The external flash SU-1 cannot be used in wireless transmission shooting. 2. The external flash SU-1 cannot be used in high-speed sync. 3. The V1Pro-CU flash head must be raised for the external flash SU-1 to work properly