WTV020SD Voice Playback Module TF Card Storage WAV AD4 Format Serial/Button Control

1、Main control chip: WTV020SD-20S
2、Storage medium: Micro SD card (TF card), maximum support 1GB (FAT file system)
3、Supported audio formats:
4、AD4 format (4bit ADPCM): Sampling rate 6kHz ~ 36kHz
5、WAV format (PCM encoding): Sampling rate 6kHz ~ 16kHz
6、Maximum number of voices: 512 voice segments
7、Audio output: 16-bit DAC + PWM dual output
8、Operating voltage: DC 2.6 - 3.6V
9、Module size: Approximately 21mm × 18mm
10、Pin spacing: 2.54mm standard pin grid
11、Weight: Approximately 4g

Main features

1、Can work independently without a single-chip microcontroller, and the buttons directly trigger playback
2、Supports LINE_OUT to connect to a power amplifier, and can also directly drive speakers
3、The voice content update is convenient, simply copy it from the computer to the SD card
4、Supports loop playback, single-track playback, and playback of specific segments, etc.
5、Widely applied in: voice annunciators, alarm devices, intelligent toys, smart home, industrial equipment voice reminders and other scenarios

We focus on three core product categories to meet diverse market demands:

1、Passive Components: We offer a comprehensive range of resistors, capacitors, inductors, and connectors, backed by stable stock and competitive pricing to support your continuous production needs.

2、Integrated Circuits (ICs) & Microcontrollers: Our portfolio features high-performance chips, including the ESP32 series, MCUs, and logic ICs. All components are sourced from authorized distributors to ensure guaranteed quality and authenticity.

3、PCB & PCBA Solutions: We provide complete supply chain support for printed circuit boards, ranging from prototype fabrication to mass production assembly, serving the IoT, consumer electronics, and industrial sectors.

4、Quality & Service Commitment
At Muren Technology, we prioritize authenticity and traceability. Every batch undergoes strict quality inspection with full lot traceability and customs declaration support. Whether you require samples, small-batch trials, or large-volume orders, our professional team ensures accurate delivery and long-term stable cooperation.