1. Support two Optical input,one Coaxial input,one AUX input,one USB 2.0 input. You can switch different signal sources randomy by Button. 2. Support one 5.1ch analog audio by 3.5mm phone connector. DA615BT with Bluethooth 5.0. 3. Audio farmat support FLAC,APE,DTS,AC3,WAV,HDCD,DSD,AAC,WMV,MP3,M4A etc. Support 5.1ch/2.0ch output mode selection,FL/FR active when 2.0ch output mode. 4. Support Button switch input source ,and turn on corresponding LED. Surpport hardware decoding (5.1 channel separation ) and software decoding(2.0ch to 5.1ch) 5 Support USB player and Input source selection power off memory function. The use of DC-5V/1A external power adapter power supply. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Voltage: AC220V Material: plastic colour: black Package Contents: 1 x Audio Decoder (DA615BT-B ) 1 adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.