Do you always feel like the DIY work is boring, not attractive or no vitality when you design it by yourself?

This new Gravity MP3 voice module produced by DFRobot can solve these problems. This module can store 8MB audio files, which means it can store more than 200 audios for your choice, support MP3 and WAV formats. Its storage method is as simple as USB flash drive, and audios can be updated at any time. It uses the DF-Gravity interface, free from wiring; It has the ability to play the specified audio, play in loop, and adjust volume. It is suitable for all kinds of projects related to sound or voice, such as intelligent car, meteorological stations, smart home devices, vehicle navigation, toll stations, safety monitoring, machine audio navigation and so on.

MP3 Module Selection Guide

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Name	DFPlayer	DFPlayer Pro	Gravity: UART MP3 Voice Module
SKU	DFR0299	DFR0768	DFR0534
Storage	Storage Card Required	128MB	8MB
Sound Channel	Mono	Dual-channel	Mono
Analog U-disk Support	No	Yes	Yes
ADKEY Control Support	Yes	Yes	No
On-board Power Amplifier Support	Yes	Yes	Yes
Audio Format	MP3, WAV, WMA	MP3, WAV, WMA, FLAC, AAC, APE	MP3, WAV
Communication	UART	UART	UART
Operating Voltage	3.3V/5V	3.3V/5V	3.3V/5V
Dimension	20*20mm/0.79*0.79"	23*24.5mm/0.91*0.96"	22*30mm/0.87*1.81"
Price	$5.90	$8.90	$6.90
Features	1. Small size 2. Support IO, serial port and ADKEY control 3. Maximum support 32G of the TF card, suitable for occasions in need of abundant audio files	1. Stereo dual-channel output 2. Support four controlling modes: Arduino, AT command, on-board buttons, and ADKEY 3. On-board 128MB high-speed storage, perfect for occasions in need of storing small numbers of audio files 4. Support the USB cable to copy music 5. Can be used as a sound card for the PC or Raspberry Pi	1. DF-Gravity interface, easy to connect 2. On-board 8MB storage 3.Support the USB cable to copy music 4. Suitable for playing sound effects and prompt sounds