1. Supports two optical inputs, one coaxial input, one AUX input, and one USB 2.0 input. Switch between different signal sources easily using the button. 2. Supports 5.1-channel analog audio output via 3.5mm phone connector. DA615BT features Bluetooth 5.0 connectivity. 3. Supports audio formats including FLAC, APE, DTS, AC3, WAV, HDCD, DSD, AAC, WMV, MP3, and M4A. Offers selectable 5.1ch or 2.0ch output mode. Front left and front right channels are active in 2.0ch output mode. 4. Button-controlled input source switching with corresponding LED indication. Supports hardware decoding for 5.1 channel separation and software decoding for 2.0ch to 5.1ch upmixing. 5. Supports USB playback and input source selection with power-off memory function. Powered by a DC-5V/1A external power adapter. Plug Type: EU Plug, suitable for use in Indonesia, Germany, France, Italy, and other compatible regions. Voltage: AC 220V Material: Plastic Color: Black Package Contents: 1 x Audio Decoder (DA615BT-B) 1 x Power Adapter Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error is +/- 1-3 cm.