4 level angle adjustment4 level angle adjustment 7.5°, 20°, 30°, 45° for user convenience.Supports up ti 17inches notebookSupports various size notebooks and bigger notebooks up to 17”. Strong and quiet cooling powerStrong and quiet cooling power with efficient airflow structure together and 200mm fan. Convenient fan controllerConveniently adjust fan speed while using the laptop with fan controller placed at the front. Convenient USB hub placementUSB hub hidden by the laptop while in use yet convenient to reach. Back cable managementBack cable management holder big enough to accommodate all your cables for tidy work environment. Dimension377 x 283 x 52 mm (WxDxH)Weight1.1kgMaterialPlastic, Steel, RubberNoise20 dBACompatible SizeUp to 17” LaptopInput Voltage5V (USB Powered)USB PortUSB 2.0 HUB 3EA / USB 2.0 Power 1EAFANBearing TypeSleeve BearingSize200mmRPM470rpm ~ 610rpm ±10%Fan ControlSupport Check the components list and condition of the product before use. If any problem is found, contact the retailer to obtain a replacement. Zalman Tech Co., Ltd. is not responsible for any damages due to improper product use. Excessive force exerted on the product may cause critical damage to the product and/or system. To prevent damages, do not allow objects to obstruct fan rotation. To prevent shorting and/or damage of the fans, do not spill liquids on the unit. Do not obstruct the air inlets. Use on a flat and vibration-free surface. Do not use in humid or dusty, under direct sunlight, or other heat sources. Please seal the unit airtight when storing for prolonged periods to prevent buildup in the inlets. Product designs and specifications may be revised without prior notification to improve quality and performance.