... DSP chips factory offer high quality Channel Stand Along DVR Kit Product DescriptionEmbedded Linux operating system +high-performance DSP chips, ... or above in a single hard disk support; Standard hardware interface: RS232× 1\RS485× 1\USB× 2, RJ45× 1; ... voice intercom and many other features Chinese / English graphical user interface, remote control, mouse (optional), control panel Xpress. And we ...