4 channel, 200Mbps bandwidth, up to 5MP decoding, 4ch 1080P preview&playback, 1 VGA/1 HDMI, 1 RJ45 (1000Mbps), 2 USB (1- USB3.0), RS232, RS485, Alarm (in/out) 4/2, Two-way talk, PoE 4 ports (IEEE802.3af), 3.5"HDD - 2 (up to 8TB), Support network cameras: Dahua, Arecont Vision, AXIS, Bosch, Brickcom, Canon, Honeywell, Panasonic, Pelco, Samsung, Sanyo, Sony, Vivotek