Amazon.com: FiiO JadeAudio KA2 4.4mm Balanced Headphone Amps USB DAC DSD256 32bit/384kHz PCM for Android/iOS/Windows/Mac (USB Type C) : Electronics
Astell&Kern HC3 USB DAC and Headphone Amplifier – Headphones.com
iFi ZEN DAC V2 Desktop USB DAC and headphone amplifier at Crutchfield
AudioQuest DragonFly® Black v1.5 Plug-in USB DAC/headphone amplifier, compatible with Apple® and Android™ mobile devices at Crutchfield
FiiO/JadeAudio KA1 MQA TypeC to 3.5mm Dongle USB DAC — HiFiGo
AudioQuest - DragonFly Cobalt USB DAC/Headphone Amplifier with Apple Lightning to USB 3 Camera Kit - Music Direct
TempoTec March III - M3 Desktop USB DAC & Bluetooth Audio DAC Receiver — HiFiGo
iFi Audio Hip-Dac portable USB DAC
The Best USB DACs • (top picks and comprehensive buying guide )
Sound Blaster PLAY! 4 - Portable Plug-and-play Hi-res USB DAC with Auto Mute and Two-way Noise Cancellation via SmartComms Kit for Conference Calls - Creative Labs (United States)