Idk if the sound is normal but it make a hissing sound wheb both ports are used when the top is unplugged it stopps until plugged in for about 45 seconds then start a slight hissing sound idk if thus is normal or not

Makes a loud buzzing sound when you use it

Uneasy about hearing electric sounds when I plug my phone in

but the other one makes a weird buzzing sound when i use it which i no longer do because i just don't trust it to not burn my house down....

One of the chargers I got works fine but another one makes a hissing sound when it is plugged in and charging a phone

It worked great for ~3 months and charged my devices quickly, then began making this annoying intolerable high pitched sound whenever I plugged it in

One works solid, the other makes a crackling electrical sound whenever a device is connected for charging

They charge fine and are super handy, but each one began emitting a scratchy low buzzing sound after a while

I like the color(s) that they have