Review on Nobsound Mini Bluetooth 5.0 Power Amplifier - Stereo Hi-Fi Digital Amp 2.0 Channel 50W×2 with AUX/USB/Bluetooth Input - Wireless Audio Receiver - PC Sound Card incl. Power Supply (Silver) by Andargie Marquez

This should get 0 stars. If you plug the power cord directly into a wall outlet or through a surge protector, the charger will make an audible "electrical noise" that lasts for several seconds after disconnection. It's like an electric fire waiting to happen. A cheap amplifier isn't worth a house fire. Very disappointed and would not recommend to anyone. Revain says the replacement will be shipping in a month, so I really kick myself for lowering the price. I've learned my lesson and I hope you can consider it before delving into it.