Version of the Plug & Play - simply plug in and work immediately * Connector: USB 2.0 & 1.1 * power cable * Supply Voltage: support USB port without the loss of the port as an additional port is located in the base cooling * Voltage: low DC 5V * Size of fans: 70 x 70 x 15 mm * Number of fans: 2 * RPM: 800 - 1400 * Airflow: 20 CFM * Noise: 16 - 23 dB * Total Size: 325 x 310 x 40 mm * Material: Metal & Plastic * Bearings: Plain * Reliability: 20,000 hours