I wasn't sure at first but my brother kept saying I needed to secure the house properly so I reached out to Dahua Nigeria. The technician that came honestly knew his stuff and explained everything about the cameras and system in a way that made sense to me instead of using all that confusing technical jargon. What got me sha was how he took time to show me how to access everything on my phone before he left so I wasn't struggling afterwards. Worth the money spent here I'll be honest.