This document describes a 4 channel D1 real-time H.264 network DVR that supports H.264 video compression, has 4 video inputs and 1 video output, supports 2-way audio with 2 audio inputs and 1 audio output, and can record in D1 or CIF compression. It connects over TCP/IP networks, supports remote access via smart phones or computers using a client, and has an internal SATA hard drive, power supply, and dimensions listed.