Zalman NS2000 High Performance Latop Cooling Stand With 4 Level adjustment (ZM-NS2000) 4 level angle adjustment 7.5, 20, 30, 45 for user convenience. Supports various size notebooks and bigger notebooks up to 17. Strong and quiet cooling power with efficient airflow structure together and 200mm fan. Conveniently adjust fan speed while using the laptop with fan controller placed at the front. 3 USB hub hidden by the laptop while in use yet convenient to reach. Back cable management holder big enough to accommodate all your cables for tidy work environment. Dimension: 377x283x52mm (WxDxH) / Weight: 1.1kg (2.41 lbs) / Material: Plastic, Steel, Rubber / Noise: 20dBA / Compatible Size: Up to 17 inch / Input Voltage: 5V (USB Powered) USB Port: 3 / Fan Bearing: Sleeve / Size: 200mm / RPM: 470 - 610 RPM / Fan Control Built In