Prior to our company bought a NVR feel, since with this NVR we usually work no matter how late how electricity is no big problem, before we have a project, you have to have all day long shift inside the company, at this time our company the voltage is always there will be some problems, sometimes have to fix the problem we spend a lot of time delay not much time but also special trouble, then heard someone say the NVR is also very good, we recommend leading directly to our company for the NVR, was also just. The results of our leadership really moved us.