HiFi Lossless Bluetooth Audio Receiver Optical Fiber Coaxial Out for Digital Amp Adopt "CSR", true digital signal output, support 5.1.Supports lossless music playback, you can directly with pure digital amplifier / DAC / etc.Bluetooth version 3.0, does not support APTX format.Can be directly connected to digital amplifier Audio output: Optical & Coaxial & Stereo L/R RCA.Original CSR 57E6 Bluetooth chip.Aluminium alloy shell Can be connected with the headphone amplifier, the amplifer with analog input interface and digital interface.With external antenna that can be disassembled and the signal is more stable Colorful LED indicator.Rubber mat.With 12V 1A power supply Package included: 1 x Black bluetooth audio receiver .1 x 12V 1A power supply