FiiO Alpen E17 Rechargeable Portable USB DAC Headphone Amplifier
Noble Hi-Fi: Fiio: E17 - review
LOSONCOER 1400mAh 523455 Battery for FIIO E17 E7 Headphone Amplifier New Li-po Polymer Rechargeable Accumulator Pack Replacement - AliExpress
Review – FiiO E17 Alpen Portable External Digital to Analog Converter/Headphone Amp (DAC) for your computer and high-resolution audio files from HD Tracks and Society of Sound. | Mac Edition Radio