Amazon.co.jp: LAMSCAT LC5100 USB C DAC Headphone Amplifier, 2.5mm/3.5mm, Portable, Built-in DAC, Small Mini Amplifier, Detachable Cable, High Resolution Smartphone, Cell Phone, Android, Windows, Mac OS, iPad, Android System (Pocket Box 2,
Amazon.com: FiiO K3 Type-C USB DAC Headphone Amp : Electronics