1 pcs 2X25W Mp3 Player Decoder Board & 1 pcs Home Theater Decoder Amplifier 5.1 Audio Decoder: 5.1CH audio decoder can transfer audio from Optical/Coaxial/Other Channel into 5.1 independent sound track(6 Channel), and output through RCA amplifier with stereo sound.Wide Application: All smart TV's digital optical or coaxial, transfer into sound track for speaker/amplifier. Suits for Smart TV/TV Box/Projector/Playstation etc as input, Amplifier/2.0 Speaker/5.1 Home Theater System as output. Multiple Interface: Multiple audio input port, Optical x 2, Coaxial x 1 and 3.5mm AUX x 1, through the chip the audio will transfer into stereo quality sound as output. Return To Sound: 5.1 channel lossless surround sound, DTS digital transformation services, DB quality sound, reach theater level quality sound with one module. Plug And play No Delay: Support Coaxial/Optical audio directly to 5.1 RCA audio output, no delay. Wired power supply available, if happen incompatible or other situation, please use with power wire.Strong "Heart" In Metal Host: sound require a high performance chip. Built in intelligent chip, using aluminum alloy as host, better performance in anti-interference and heat dissipation. MP3 Player Decoder Board: 1. Digital large color screen display 2. Support calls (long press the pause button to answer the call when there is an incoming call). 3. Support recording; support power-off memory; support song format MP3 /WMA / WAV / APE / FLAC. Recording only supports operation in TF mode or USB mode.(Long press the MODE button to start recording, long press the MODE button again to cancel the recording and play the recording file; exit the recording mode and long press the pause button to exit. When recording, you need to connect a storage device, such as: U disk or TF card;) 4. Can be directly connected to speakers, with power amplifier and decoding functions. 5. Main functions MP3/USB/TF/LINE IN/FM/BLUETOOTH/remote control Bluetooth vers