Audio-Technica R70X Professional Open-Back Reference Black Headphones w/ AMP Bundle Includes, FiiO E10K USB DAC and Headphone Amplifier & Slappa HardBody PRO Full Sized Headphone Case (Black) - Walmart.com
FiiO E10K OLYMPUS Computer USB DAC and Headphone Amplifier (Black) - Newegg.com
FiiO E10K TC Hi Res Portable USB DAC & Headphone Amplifier PCM5102 32bit/384kHz Type C connector Headphone/Coaxial/Line output|Headphone Amplifier| - AliExpress
FiiO E10K-Type-C USB DAC and Headphone Amplifier - FIIOE10K-TC
FiiO Headphone Amps Portable DAC USB Type-C Coaxial | Pete Organics
FiiO E10K USB DAC and Headphone Amplifier (Black) (5ef4801abcb78b0c3ba7611e7fc4085b) - PCPartPicker