QNAP VS-4116-PRO+-US 4 Bay 16CH, VMS Built-In, 250Mbps Megapixel Recording IP Surveillance NVR Ports: 2 x Gigabit RJ-45 Ethernet port 2 x USB 3.0 port (Back: 2) 5 x USB 2.0 port (Front: 1; Back: 4) Video Output: 1 x HDMI Processor: Dual-core Intel processor Memory: 4GB RAM Power Supply: Input: 100-240V AC, 50/60Hz, Output: 250W Power Consumption: In Operation: 62.7W (with 6 x 2TB HDD installed) Temperature: Temperature 0~40 Degree C/ 32~104 Degree F Humidity: Humidity 5~95% RH non-condensing Dimensions: 7.28 x 7.09 x 9.25 (H x W x D)