ViDi Sci-Tech  Electronic Co.,Ltd. has developed the product about Video door phone  at present. Such as Monitor? One-B camera ?managing center etc. For years,VIDI has been helping businesses do business better. We build and service the machines you rely on to help your organization function smoothly and efficiently.   Video door phone,  video surveillance system, intelligent locks,  electric rim locks, door closers and other  hardware from  VIDI range.