Universal AC input, full range, built-in active PFC function PF>0.93, 100% full load burn-in test, short circuit, over load and over voltage protection, built-in constant current limiting circuit, LED indicator for power on, fixed switching frequency at PFC: 7KHz PWM:134KHz. Built-in ON-OFF control and remote sense function, with parallel function; Can adjust from 20%~100% output voltage by external control 1-5V; Focred air cooling by built-in DC fan; High reliability, low ripple, universal AC input or full range, with short circuit, over load, Over voltage and over temperature protection.