Mint GO2A Infinity. The best portable USB DAC/Amp in existence, IMO. This is has been updated to the latest firmware from LH Labs, version 2.1, which as volume control buttons (128 segments/steps), Line Out mode, smart gain for its three gain settings (100mW, 450mW, 1000mW), additional digital filters. Comes with 4pin XLR adapter. FIRM Price includes PP fees and CONUS shipping. Selling as I use my desktop amp/dac at home. No trades.