Dahua DHI-HCVR7104H-S2 4 x BNC 1 SATA port, up to 4TB 4CH Tribrid 1080P Mini 1U HDCVI DVR Network Interface: 1 x RJ-45 port (10/100M) Audio Input: 1 x RCA Compression Format: H.264 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 Dimensions: 2.17 x 12.80 x 10.04