QNAP VS-12156U-RP-PRO+-US 12 Bay 2U 56 Channel Redundant Power NVR Ports: 4 x Gigabit RJ-45 Ethernet port 2 x USB 3.0 port (rear) 4 x USB 2.0 port (rear) Video Output: 1 X HDMI 1 x VGA Processor: Intel Core i5 3.7GHz Memory: 8GB DDR3 RAM Power Supply: Input: 100-240V AC, 50/60Hz, Output: 600W Temperature: Operation Temperature 0~40 Degree C/ 32~104 Dedree F Humidity: 5~95% RH non-condensing Dimensions: 3.46 x 17.28 x 20.47 (H x W x D)