Dazzling preset lighting effect (purple/blue/orange) from 6 high-brightness, long-lasting LEDs. Optimized 9 fan blades design, balancing air flow and wind pressure. PWM smart adjustment technology, effectively reducing wind noise. 4-pin power connector for high-performance and stability. 4 standard-sized screws, keeping the frame stable and the installation simple. Improved hydraulic self-oiling bearing, yielding enhanced product life-span.