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This 5V DC 1A USB power supply has a 90-264V AC input for world use. It carries full international safety approvals and meet the latest ErP stage 2 requirements with high reliability (M.T.B.F of 50K hours at 25 degrees C.) The SW4492-V2 power supply can be used to charge a wide range of products. This PSU is supplied in black.
Q. Is the 5v dc O/P pure enough to drive an amplifier designed for use with a computer without hum?
A. Hi Keith, thank you for your question. This is intended to be used as a charger for USB devices. Most switch mode supplies of this nature will cause some sort of audible noise in audio equipment, usually as a high pitched sound rather than a hum or both. We would suggest contacting the manufacturer of the amplifier for recommended AC adaptor types. We cannot guarantee that this would be noise free.