The circle on the camera head may be black or red, this is normal. This GODOX V100 version is a USA version. You may see the USA version on the package, which is normal. （GODOX V1 Upgraded） | Application: The Godox V100 camera flash for Canon has the same compatible models as GODOX V1 for Canon and GODOX V1 PRO for Canon.The Godox V100-C Round Head Flash is suitable for Canon EOS Cameras, such as for Canon 5D Mark IV for Canon RP for Canon M50 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, etc | 100Ws Godox flash, 70 Full-Power：As an upgraded version of GODOX V1 for Canon and GODOX V1 PRO, The GODOX V100 sets a new benchmark for on-camera flashes by offering an unprecedented 100Ws power at its maximum output(M mode). With adjustable power steps from 1/1 to 1/256 or from 2.0 to 10. Thanks to its advanced cooling system, the GODOX V100 delivers 70 to 100 consecutive flashes at 100Ws without compromising performance. | Intuitive Touchscreen & Detachable Sub Flash: The GODOX V100 for Canon is Equipped with a 2.3" full-color, high-sensitivity touchscreen. It allows photographers to quickly adjust power levels of the godox flash, activates high-speed sync, switch between TTL/M modes, and pair devices with a single tap. The GODOX V100 camera flash for Canon continues the highly praised detachable sub flash (SU-1) design from the GODOX V1 Pro godox flash. | Built-in 2.4G Wireless &LED Modeling Lamp: With the built-in Godox 2.4G Wireless X System, the The GODOX V100 for Canon functions as both a master and receiver unit. Its one-tap pairing capability seamlessly integrates with the GODOX X3 trigger or other Godox TRIGGER or wireless flash units. A 2W LED modeling lamp with 10 adjustable levels provides flexible options for previewing light effects or serving as a fill light | Powerful Battery, Convenient Charging: Powered by the same high-performance lithium battery as the GODOX V1 and godox V1 Pro, the GODOX V100 ensures uninterrupted shooting. The Type-C charging port and compatibility with the GODOX VC26T Multi-Battery Charger make recharging quicka nd convenient.