DY-HV20T is an intelligent voice playback module, integrated IO segment trigger, UART serial port control, ONE_line single bus serial port control, standard MP3 and other 7 working modes, simple DIP switch settings; onboard 20W class D power amplifier; support MP3 , WAV decoding format, can support up to 32G TF card, you can connect the computer through the USB data cable to update the TF storage audio files. Support MP3, WAV decoding format. Support sampling rate (KHz): 8/11.025/12/16/22.05/24/32/44.1/48. 24-bit DAC output, dynamic range supports 90dB, signal-to-noise ratio supports 85dB. DC 6~35V ultra-wide working voltage. The maximum support is 32G memory card, and the audio files can be updated and stored by connecting to a computer via a USB data cable. Integrated high-power amplifier output, driving 4 ohm speakers up to 20W, driving 8 ohm speakers up to 10W. The UART serial port controls broadcast function, which can control play, pause, song selection, volume addition and subtraction, etc. The maximum selection of is 65535 , 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 Product name: DY-HV20T voice playback module Product number: DY-HV20T Working voltage: DC 12V/24V Operating temperature range: -20~85 Working humidity range: 0%-95%RH Size: 50x50mm Colour: black Material: PCB+metal Package Contents: 1 * Voice playback module Only the above package content, other products are not included. Note: Light 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.