***** **********Best Quality Guranteed. *****CSR Bluetooth 5.0 QCC3008 chip support High fidelity aptX and aptX low latency, high gain antenna for long range streaming up to 115 ft (35m) without hindrance; *****Easy setup, Plug-n-play, no software is needed, connects in seconds, streams audio from any Bluetooth-enabled media player; *****Hi-Fi headphone amp chips TPA6120 OPA2134 with UPC1237 headphones protect circuit, newly upgraded power circuit to support 32-600 ohms headphones*****Bluetooth, USB, Aux, Optical and Coaxial S/PDIF inputs, can choose the input mode. With the volume control knob that can adjust the headphones as well as the RCA output; *****Support the phone player with OTG audio input function, Hi-Fi DAC Bluetooth receiver and headphone amp can be connected with powered speakers or amplifier.