4 Buttons Triggered MP3 Player Board with 10W Amplifier and Terminal Blocks High quality audio decoder which, supports MP3 and WAV audio formats. Sampling rates supported: 8/11.025/12/16/22.05/24/32/44.1/48 (KHz). 24 bit DAC output and supports dynamic range 90dB and SNR 85dB. Supports one-on-one 4 button trigger control mode and RS232 serial port control mode. Skill Level : Assembled and Tested