Desktop DAC/headphone amplifier with AKM AK4499EX + AK4191EQ, THX AAA 788+ amp, PCM up to 768 kHz/32-bit S/PDIF up to 192 kHz (Coax) or 96 kHz (Optical)Bluetooth: QCC5124 with LDAC, aptX Adaptive/HD/LL, aptX, AAC, SBC (BT 5.1)Inputs/outputs: USB-B headp