Optical fiber: up to 192kHz/24bit. USB IN:SBC/aptX/aptX HD/aptX LL/LDAC. SPDIF IN:SBC/aptX/aptX HD/aptX LL/LDAC. USB IN:SBC/aptX/aptX HD/aptX LL. UAC1.0(adjust on APP)/UAC2.0.DAC mode: supports optical input bypass to optical output TX mode: supports optical input bypass to optical output + Bluetooth TX output. 0.0008%(USB DAC 1kHz). This item is in the category "Consumer Electronics\Portable Audio & Headphones\Portable Audio Accessories\Transmitters". The seller is "sillyname48" and is located in this country: US. This item can be shipped worldwide.