Video: Input: 24 Channel Support (17 x RJ-45 Ports) 16 Channel PoE / Conventional Connection (16 x RJ-45 / 1 x RJ-45 Network) 24 Channel Conventional Connection (Via 1 RJ-45 Network Port) Output: VGA, HDMI Recording: Real-Time 24CH Playback: 4 Channels Simultaneously Audio: Input: Depend on Camera Output: 1 Channel (RCA) Mic In: 1 Channel (RCA) 2 Way audio Storage: 8 x SATA (Up to 3TB) USB Port: 2 x USB2.0 Network: RJ-45: 1000Mbps Alarm: Input: 16 (Dry-Contact) Output: 4 (Dry-Contact) PTZ / Keyboard: 2 x RS485 Protocol: Pelco DP/Samsung/Visca