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Amazon.com: USB Wall Charger Surge Protector 5 Outlet Extender with 4 USB Charging Ports ( 1 USB C Outlet) 3 Sided 1800J Power Strip Multi Plug Outlets Wall Adapter Spaced for Home
When I have a USB cord plugged into the power board, I hear a high pitched noise and then when I remove the cord, the sound stops. No one else hears this.
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