The product name says "YI MEI DA Upgrade Switching Power Supply 48V 20A 1000W Power Adapter AC 110V/220V Driver Transformers SMPS for CCTV, Radio, Computer Project LED Lighting Modules", so you can 110 or 220 volts but as you can see on the label in the pictures it only says 110 volts and there is no button on the back of the power supply to change the input voltage to 220 volts. So it's an error in the title and product images?
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