DFRobot - Fermion: DFPlayer Pro (MP3 Player with On- board 128MB)

Features • On-board 128MB High-speed Storage • Playback Switch by Button  • Dual-channel  • Support analog U-disk Applications • DIY Plush Toys • Handmade Personalized Gift • Musical Alarm Clock • USB Sound Card Specification • Power Supply: 3.3V~5V • Operating Current: gt;20mA • Storage: 128MB • Audio Format: MP3, WAV, WMA, FLAC, AAC, APE • Communication: UART • Operating Temperature: -20℃~70℃ • Operating Humidity: 5%RH~95%RH • Dimension: 23*24.5mm/0.91*0.96” Sources : https://wiki.dfrobot.com/DFPlayer_PRO_SKU_DFR0768