Fosi Audio
Fosi Audio DS1 DSD512 HiFi DAC Headphone Amplifier Mini Audio Receiver USB DAC Headphone Amp Supports 32bit/768kHz with 3.5MM and 4.4MM Dual Headphones Outputs for Smartphones/Laptop/PC/Music Players
FiiO
FiiO JadeAudio KA3 Headphone Amps Tiny USB DAC and Amplifier Supports 32bit/768kHz and DSD512 Headphone Outputs 3.5mm/4.4mm for Smartphone/PC/Player
FiiO
FiiO JadeAudio KA1 Headphone Amps Tiny Amplifier USB DAC High Resolution 3.5mm Lossless for Smartphones/PC/Laptop/Players(Type C, Black)
FiiO
FiiO JadeAudio KA2 Headphone Amps Tiny Amplifier USB DAC High Resolution Lossless Sound for Smartphone/PC/Laptop/Tablet/Players (Lightning,Black)