This is really an odd camera: It’s a smartphone, it has a FourThirds sensor but it uses the Canon EF-mount. It would have made a lot more sense if the Yongnuo YN450 would feature a Micro Four Thirds mount. Lenses would be smaller and the mount flange distance much short. I hope they will make a MFT mount version of this!
Anyway, here are the first unboxing pictures of the Yongnuo YN450 via Weibo: