1. Support MP3, WAV decoding format. Support sampling rate (KHz): 8/11.025/12/16/22.05/24/32/44.1/48. 2. 24-bit DAC output, dynamic range support 90dB, signal-to-noise ratio support 85dB. Ultra-wide working voltage of DC 6-35V. 3. Integrated 64Mbit (8M bytes) FLASH memory, no memory card required. Integrated high-power amplifier output, the maximum output of driving 4ohm speakers is 20W, and the maximum output of driving 8ohm speakers is 10W. 4. The UART serial port controls the voice broadcast function, which can control the functions of playback, pause, song selection, volume addition and subtraction, and the maximum selection of 65,535 songs, the baud rate is 9600 bit/s. 5. Support IO one-to-one trigger playback function, 8 IO ports individually trigger 8 tracks or 8 IO ports combined to trigger 255 tracks. 1. Support One_line single bus serial port control, which can control the functions of playing, pausing, selecting music, adding and subtracting volume. 2. Support 3 configuration IO to select up to 7 working modes, dial switch settings, simple operation. 3. 8-channel IO design ESD protection colour:Black Material:ABS size:50 x 45mm Package Contents: 1 x voice module