They sent a very cheap power adapter with this item, it broke the first time it was connected. Luckily I had another power supply that worked with the amp. work as stated. If connected via Bluetooth try disconnecting and connecting via USB on the back, it doesn't seem possible to get out of Bluetooth mode. Aux mode is a different story. When connected this way, I can press the Bass/M button to toggle between Bluetooth and Aux. But when I'm connected to a USB port, the Bluetooth mode doesn't exit. Definitely wouldn't buy again, would spend a little more to get something that hopefully works a little better.
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