Dahua DHI-HCVR51A16HE-S3 HCVR 16CH HD / ANA / IP 1 SATA Network Interface: 1 x RJ-45 port (10/100M/1000M) Ports: 2 ports (1 Rear USB 3.0, 1 Front USB 2.0) Audio Input: 1 x RCA Compression Format: H.264 / G.711 Operating System: Embedded LINUX Power Supply: Power Supply : DC 12V / 2A Power Consumption: 10W (without HDD) Temperature: -10 degree C ~ +55 degree C Humidity: 10% ~ 90% RH