Mean Well LRS-350-5 300W 5V Power Supply for LED Signs (2 Pack) Input voltage: 110-240V; Output voltage: 5V; Power: 300 watts AC input range selected by swtich Protections: Short circuit/overload/over voltage/over temperature Built-in cooling Fan On-OFF controlLED indicator for power onFixed switching frequency at 90Khz 2 Year factory warranty Forced air cooling by built-in DC fan