High-Quality Quiet FanEfficiently cool electronic components with our high-quality 4-pin PWM fan. Perfect for 1U servers and network/storage equipment. Automatic Speed ControlEnjoy automatic speed control via 4-pin PWM fan headers. Maximum speed of 5000 RPM ensures optimal cooling performance. Dual Ball BearingExperience long-lasting performance with our dual ball bearing fan. Designed for >50,000 hours of reliable operation. Versatile Replacement FanReplace fans in various equipment such as inverters, PSUs, 3D printers, switches, NAS, and DVRs. Compact 40x20mm size for easy installation. Upgrade Your CoolingUpgrade your ITX build, motherboard, NVR, DVR, or UDM Pro with our high-quality PWM fan. Maximize cooling efficiency and ensure optimal performance.