1、播放mp3格式文件，fm收音功能 2、支持16gb的u盘和sd卡，文件内均可以播放 3、单一按键控制外音源输入，或ad全键功能控制 4、丰富按键功能 5、全遥控功能 6、使用电源5v 7、兼容性好，插u盘和sd卡，也可外接产line输入 8、opt28芯片，程序可以改写，低价稳定 9、sd u盘左右结构通用 1, play mp3 format files, fm radio function 2, support for 16gb of u disk and sd card, files can be played in both the 3, single push button control external audio input, or the ad control all key functions 4, functional button-rich 5, full-function remote control 6, using the 5v power supply 7, compatibility, and insert u disk and sd card can also be external products line input 8, opt28 chip, the program can be rewritten, price stability 9, sd u disk structure around common