43.2 cm (17") Number of built-in cooling fans: 1 800 RPM 72 cfm 21 dB Host interface: USB Power source type: USB Black Ergonomic DesignSix (6) height settings for comfortable viewing angles.Exclusive Fan Blade DesignProvides better air dissipation to increase laptop performance.Loop Dynamic Bearing (LDB)Self-lubricating fan features highest IP6X dustproof rating and stays durable for over 160,000 hours lifespan.Silent Driver ICGenerates ultra-low noise, minimal vibration, and extremely low power consumption.Ultra Quiet OperationThanks to the new Loop Dynamic Bearing technology, the ErgoStand III is able to provide 72 cubic feet per minute of airflow at only 21 dBA, which is equivalent to the volume of a rustling leaf in a light breeze.Aluminum Fan Speed DialHigh quality, precision-etched aluminum dial includes fan toggle (on/off) function.Dust-Free MaintenanceRemovable front plate enables quick cleaning to sustain high performance.Cable Management and USB HubGrooves and hooks keeps wir