ITEM NAME:BY8301-16P SSOP2 MP3 aduio serial voice SPI FLASH module`3W amplifier micro USB` MP3,WAV file format:Supports sampling rates 8 ~ 48K,8 ~ 320Kbps bit rate audio files USB interface:2.0 standard (Micro USB interface) UART interface:Standard serial port, 3.3V TTL level,baud rate 9600 Input voltage:3.6V-5V (recommended 4.2V) Quiescent Current:15MA (entire module) Amplifier power:connect 2W / 4Ω or 1W / 8Ω speaker Size:21mm * 18mm Operating Temperature:-40 °C ~ 70 °C Humidity:5% to 95% Maximum support 16M byte capacity:such as?GD25Q16[2M byte]ã€GD25Q128[16M byte] Standard 2.54mm pin header, DIP16 package 24 bit DAC output, dynamic range support 90dB, SNR support 85dB. Package included: 1 x Module.Amplifier power:connect 2W / 4Ω or 1W / 8Ω speaker. USB interface:2.0 standard (Micro USB interface). UART interface:Standard serial port, 3.3V TTL level,baud rate 9600. Quiescent Current:15MA (entire module).