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, can be connected to the computer through USB data cable update TF storage audio files. DY-HV20T Industrial grade voice playback module: Wide voltage power supply: DC:6-35V High power output: Class D power amplifier output 20W TF card storage: Support 32G memory card 8 channel I/O single or combination control playback UART Serial port controls playback OneLine Single-bus control playback 8-way IO design ESD protection Supports 32GB TF card storage USB directly copy audio files Seven trigger modes are available for DIP switches Onboard 20W Class D power amplifier Onboard volume control knob I/O one-to-one trigger play UART controls the playback Single bus control playback Colour:black Material:plastic Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 5 * 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.