FiiO E17 USB DAC Headphone Amplifier

The E17 USB DAC Headphone Amplifier from Fiio is a compact amplifier that improves the sound quality of practically any portable audio source. The amplifier has a standard mini USB interface that can connect to a computer to accept digital audio and also to charge the amplifier's battery. Standard 3.5mm line and S/PDIF inputs let you connect analog and digital sound sources, such as MP3 players, smartphones, tablets, and more. The 3.5mm stereo headphone jack accepts the vast majority of headphones and earphones.