This is a Massdrop for the FiiO E10 Olympus, one of the smallest, most financially efficient DAC/Amp combos available. The E10 Olympus is easy to use with driverless installation on OSX and Windows alike. Just plug it in, plug in your headphones, turn up the digital volume control and enjoy. Want to use it as a dedicated DAC to output for powered speakers? No problem, it’s got coaxial and 3.5mm line out capabilities. The sound is balanced, a little dark by some standards, but very solid all around, especially given the price.