TCG TITAN Portable USB DAC/Headphone Amp Gain/EQ control A powerful mini Headphone and and DAC that offers plenty of power and can be carried anywhere The Titan features a three set Gain option to tweak your music experience along with 3 adjustment settings for EQ, which will pronounce the bass if required Long life battery power assures you should be able to take along for 2 or more hours of extended play time before charging. Comes with all necessary cables and plastic band for securing to your listening device. One of the world's smallest combination DAC and Headphone amp in existence! Works great when combined with mp3 devices/smart phones and allows you to hear what you have been missing in compressed files.