- LEPA modular frame with LEPA logo halo ring design to increase more airflow.\n- S-blade with winglet design to improve cooling efficiency.\n- Patented Barometric Oilless (BOL) Bearing for long lifespan and silent spinning.\n- Extra 7V / 5V adapter provide 3 speed modes for maximum flexibility.\n- Rubber screws to reduce vibration and keep silent operation.\n- Removable fan blades for convenient cleaning.\n\nFrame Design\nThe specially designed LEPA halo ring increase the cooling performance by allowing more air being absorbed from 4 sides of the frame.\n\nBlade Design\nThe S-blade composed with an advanced winglet structure which minimize the turbulence and stabilized\nthe airflow; it allows the fan to operate with lower noise level and higher flow rate.\n\nBOL (Barometric Oilless) Bearing\nPatented BOL (Barometric Oilless) bearing is a self-lubricating design with Nano materials. The bearing features minimal friction operation; therefore it is quieter than traditional 2 ball-bearing. The special Nano materials intentionally used for high working temperature, with MTBF ≧160,000 hours.