Hi, 
  
I have a few questions and would really appreciate any help/advice. I'm looking to buy a few Hikvision 4K outdoor dome cameras, specifically the DS-2CD4585F-IZ(H). 
  
I'm seeing them on some UK sites for £800-900 but I'm also finding them on Chinese sites for £300. The Chinese sites don't specifically refer to them as Hikvision but they do use the same model number. 
  
Also on the Chinese sites, I'm seeing two language versions - Multi-language and English - with the cheaper cameras being multi-language. 
  
So, my questions are: 
  
1. Are the cheaper £300 cameras on Chinese sites genuine? Are they Hikvision? 
2. What's the difference between the two language versions? Is the multi-language version straightforward for a non-Chinese speaker to follow? 
3. If the cheaper Chinese cameras aren't genuine, what firmware would I use? Will Hikvision firmware work? 
  
I'm in Hong Kong quite a but with work so getting hold of the cheaper cameras will be easy, but am I wasting my money? Should I even be considering the cheaper cameras? 
  
Many thanks for your help 
  
Phil