HiFi Bluetooth Vacuum Tube Amplifier Mini Desktop USB Stereo Power Amp Subwoofer

This thing was great for 4 months and then the Bluetooth just stopped working. I can’t seem to get Douk Audio to respond to my email request for help, and they don’t seem to have a phone number. So don’t buy this if you want something that lasts. The rest of it works well still, but I bought it because of the integrated Bluetooth and subwoofer output, so it is pretty useless to me now.