MP3 Player Voice Playback Module I/O Trigger UART Control SD/TF Card For Arduino. Description: Smart voice module Integrated IO trigger, UART protocol control, One_line single-bus protocol control,standard MP3 and other 7 operating modes setting by DIP switch; Drive 4~8, 3~5Wspeaker by a 5W class D audio amplifier on board; Support MP3, WAV decoding; SupportTF card for maximum 32G downloading music files directly by micro USB connector. Product Characteristics: 1. Support MP3WAV decoding 2. Support sampling rate (KHz):8/11.025/12/16/22.05/24/32/44.1/48 3. 24bit DAC outputsupport dynamic range 90dBSNR 85dB 4. Support FAT16/FAT32 file systemsupport TF card for maximum 32G 5. Drive 4~8 speaker by 5W class D amplifier chip on board 6. Play 65535 pieces of music by UART control protocol; Play, Pause, Selecting music,VOL /- and so on can be controlledthe communication baud rate is 9600bps 7. Play 255 pieces of music by IO triggering; 8. Play music by One_line control protocolPlay, Pause, Selecting music, VOL /- and so on can be controlled. 9. Switch 7 operating modes using DIP switch easily Package Included: 1PC x Voice Playback Module MP3 Player I/O Trigger UART Control SD/TF Card For Arduino ( Manual not included, so please only buy if you know how to use it via descriptions)