43.2 cm (17") Number of built-in cooling fans: 1 1000 RPM 89.8 cfm 19 dB Host interface: USB Power source type: USB Black Ergonomic design for best viewing / typing angleNOTEPAL XL is ergonomically design for a better viewing and typing angle, allowing you to work or play on your laptop for prolonged periods without straining your neck, back and wrist. Great at home or in the officeSilent 230mm fan for laptop coolingThe silent 230 mm fan with optimized fan blades provides outstanding performance for laptop cooing.3 USB adaptors + fan speed controller3 USB adaptors allows you to extend your limited USB port from notebood.Front Vent Assure Maximum Air OutputFront vent provides a smooth breeze keeping your hands cool and dry.X-shape blue LED fan with optimum air flowQuiet yet powerful 230 mm fan with neon a blue LED helps circulate excess heat from your laptop. Adjustable fan speed gives you the best balance between silence and performance. Performance Noise level 19 dB Fan performance 89