What warranty does this power supply come with, and where can I find support if I encounter issues?

3 years warranty and 24 hours fast after-sales support from countries in Asia, Europe and America.

Is this power supply compatible with both 110V and 220V input voltages?

Yes, the power supply can accept input voltages from 85 to 264Vac, which includes both 110V and 220V.

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MW Mean Well Enclosed Type RSP-500W-12/15/24/27/3.3/4/48/5V PFC RSP Series 500W Single Output with PFC Function Power Supply (RSP-500-24)

100% original RSP-500W|(12V 41.7A).(15V 33.4A).(24V 21A).(27V 18.6A).(3.3V 90A).(4V 90A).(48V 10.5A).(5V 90A) For Factory automation control apparatus,Test/measurement instrument,Laser related machine,Burn-in facility
The RSP-500 series is a 500W single output enclosed type AC/DC power supply.
Input 85-264Vac, Forced air cooling by built-in DC fan, High efficiency up to 90.5%
Built-in active PFC function, Built-in remote ON-OFF control/remote sense/DC OK signal, Short circuit/Overload/Over voltage/Over temperature Protections, 3 years warranty
30 years of well-known standard power supply brand, 24 hours fast after-sales support from countries in Asia, Europe and America More than 85% of MW's(MEAN WELL's) products can be shipped within 24 hours, supporting mass wholesale.