radius RK-DA60C Portable Headphone Amplifier: USB Type-C USB-C Type C 32bit / 384kHz High Resolution Ultra Small DAC DAC Amplifier 3.5mm Earphone Earphone Type-A Conversion Included RK-DA60CK - Walmart.com
Luxury & Precision W2 Review - Best Portable USB DAC AMP for Smartphones? - ThePCEnthusiast
Amazon.com: Fosi Audio DS1 DSD512 HiFi USB C DAC ES9038Q2M Mini Audio Headphone Amp Adapter Supports 32bit/768kHz with 4.4MM and 3.5MM Dual Headphones Outputs Compatible with Smartphones/Laptop/PC/Music Players… : Electronics
Amazon.com: HELM Audio Bolt DAC/AMP, USB-C Portable High-End DAC/Headphone Amplifier with MQA Playback. Mobile Studio Sound for Android, iOS and PC. USB-C to 3.5mm Audio, THX Certified : Electronics
FiiO KA3 Small USB DAC and Amplifier | Best Prices