1. Support MP3, WAV decoding format. 2. Support sampling rate (KHz): 8/11.025/12/16/22.05/24/32/44.1/48. 3. 24-bit output, dynamic range supports 90dB, signal-to-noise ratio supports 85dB. 4. DC 6~35V ultra-wide working voltage. 5. Integrated 64Mbit (8M bytes) FLASH memory, no memory card required. Integrated high-power amplifier output, the maximum output of driving 4 speakers is 20W, and the maximum output of driving 8 speakers is 10W. The UART serial port controls broadcast function, which can control play, pause, song selection, volume addition and subtraction, etc. The maximum selection of songs is 65535 songs, and the baud rate is 9600 bit/s. Support IO one-to-one trigger playback function, 8 IO ports can trigger 8 tracks individually or 8 IO ports can trigger 255 tracks in combination. Support One_line single bus serial port control, which can control functions such as play, pause, song selection, volume addition and subtraction. Support 3 configuration IOs for up to 7 working mode selections, DIP switch settings, and simple operation. 8-way IO design ESD protection Specification: Product Name: DY-HV8F Voice Playback Module Product Number: DY-HV8F Work Voltage: DC 6V~35V Load: 8ohm/10W or 4ohm/20W speaker(Not include!) Working Temperature range: -20 Celsius~85 Celsius Working Humidity range: 0%-95%RH Size: 50 x 50 x 13mm Colour: black Material: PCB+Metal Package Contents: 2 x Voice playback module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.