Through medical safety regulations (MOOP level (Operator Grade) ) medical use of built-in chassis type power. The built-in active power factor correction circuit (PFC) is beneficial to improve energy utilization and reduce harmonic interference, high efficiency, low load < 0.6W and low leakage. ^^Output 450W 12V 37.5A. ^^Original and Genuine, We can check the serial number on the meanwell website. ^^We don't believe in cheap and cheerful. Reasonable price to ensure quality and service. Buy it now, save time, save life. ^^This item will ship MSP-450-12*1pcs, enjoy shopping and best wishes!