The ZEN 400 FANLESS/NOISELESS of ATX12V v2.2 high performance power supply unit is thoroughly represented by the breakthrough in power conversion technology. ZEN 400 is designed specifically for the purpose of operating in a noiseless environment. It features advanced Active Power Factor Correction (PFC) technology to deliver maximum power conversion ratio by utilizing the high-quality, industrial-type components, and the latest technology in advanced circuitry design. FSP Quality Assurance Program, a manufacturer’s direct service guarantees quality and performance for a period of 3-Year, included. All models are qualified for RoHS, Lead-Free, Green Product (G.P) global environmental friendly status.