Converts AC voltage (AC110/220V±15%) to 48V DC with more sufficient power. Power 500 Watt Max. Efficiency more than 80%. item size : L 21.5cm W 11.2cm H 5cm weight:698g Main using character :1. cool fan works automatically according to working temperature. 2. 110V/220V is selected by switch before power on .please check your input voltage and puch it to right voltage site to avoding damage.please pay attention to it. 3.Mico adjusting switch could revise + - 5% output voltage .Smart device surge protection for Shortage Protection, Overload Protection, Over Voltage Protection. Widely used in Industrial automation, LED module, communications, CNC Stepper, etcput Perfectly designed and well constructed, more stability and reliability. High efficiency: The switching power supply driver adapter has higher working efficiency and lower DC ripple, which is very practical. The power driver can work at a lower working temperature and has a long service life