Dahua DHI-NVR42A04-P-2T NVR 4CH POE 2TB Series: Lite Series Network Interface: 1 x RJ-45 port (10/100/1000Mbps) 4 x PoE ports (IEEE802.3at/af) Audio Input: 1 x RCA Compression Format: H.264/MJPEG Processor: Dual-core embedded processor Operating System: Embedded LINUX Power Supply: DC12V/4A PoE: DC48V/1.04A NVR: 20W (without HDD) PoE: Max 25.5W for single port Temperature: -10 degree C~+55 degree C