Zalman zm-ns1000 Notebook Cooling Pad 5 Level angle adjustment 5 level angle adjustment 7.5, 20, 30 , 45 , 50 for user convenience. Strong and quiet cooling power Strong and quiet cooling power with efficient airflow structure together and 180mm fan. Supports up to 16inches Notebook Supports various size notebooks and bigger notebooks up to 16 Inch. Back cable management Back cable management holder big enough to accommodate all your cables for tidy work environment. Specifications Technical details On/off switch Yes Fan speed control No Rotational speed 550 RPM Number of built-in cooling fans 1 pc(s) Maximum screen size 40.6 cm (16\") Material Plastic, Steel, Rubber Fan diameter 18 cm Product colour Black Ports & interfaces USB version 2.0 Host interface USB USB ports quantity 2 Power Input voltage 5 V USB powered Yes Weight & dimensions Weight 1.3 kg Dimensions (WxDxH) 352 x 315 x 45 mm