MP3式消防广播主机GB9215（前置放大器）
1,MP3播放器
2,USB接口可配接U盘、读卡器播放音乐
3,具有曲目显示屏
4,自供稳压电源

5,尺寸2U                              

MP3 Player
1,MP3 player .
2, USB interface can be equipped with U disk, card reader to play music.
3, Repertoire display screen.
4,Self-regulated power supply

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