brand new and high quality The module is a kind of simple MP3 player device which is based on a high-quality MP3 audio chip. It can support 8k Hz ~ 48k Hz sampling frequency MP3 and WAV file formats. There is a TF card socket on board, so you can plug the micro SD card that stores audio files. MCU can control the MP3 playback state by sending commands to the module via UART port, such as switch songs, change the volume and for play mode and so on. You can also debug the module via USB to UART module. It is for Arduino/AVR/ARM/PIC. Features: Support sampling frequency (kHz): 8/11.025/12/16/22.05/24/32/44.1/48 Support file format: MP3 / WAV Support Micro SD card, Micro SDHC Card Onboard 3-watt mono amplifier On-board speaker interface XH2.54-2P, can connect to external speakers such as 8 ohm 3-watt, 8 ohm 2 watt, 8 ohm 1 watt 30 class adjustable volume UART TTL serial control playback mode, baud rate is 9600bps Serial communication format: 8N1 Working voltage: 3.7~5.25V DC On-board headphone jack, it can connect headphones or external amplifier. On-board TF card connector Dimensions: 2.3x4.3cm 8ohm 1W Speaker: Can be directly plugged onto the Serial MP3 Player module to use. Magnetic forms: inner magnetic Rated impedance: 8 ohm Rated Power: 1 W Dimension: diameter 4.9cm/1.93inch Great for speaker and amplifier projects DIY. Package includes: 1 x UART Serial MP3 Music Player Module With Speaker