... .Support sd card and usb-disk MP3 modules, playback voice module, talk sound products Features* With an amplifier, make the ... will read SD card automatically.* 5 buttons, one SIP Slave connection.* There are 2 interfaces for digital tube display.* Audio format ... mode, mp3 mode MP3 modules, playback voice module, talk sound products,mp3 module,sound module,mp3 board, SD card voice player, sound device ...