Dear , our comany Tomsee Technology co.ltd. is a manufacyury in shenzhen,We product FM Transmitter , Mobile phone charger, Power Inverter ,Portable Digital Power Supply ..... Hope to cooperate with you . Company Name :Tomsee Technology co.ltd. E-mail : zenghuansw(AT)126.com Country :China pesentation of wireless MP3 wireless MP3 afford the same sound level as CD,you can enjoy the high taste sound via it. it not use compact disc,and it can edge out CD walkman,you not only can save your the money to buy compact disc, but also can download the song freely anytime,as you know,there are more 500 thousand songs over internet, you can use it freely,and you can do your music by yourself,combination the content and order of music, additions and deletions it randomly,and you don't buy a full CD because you like one or two song on it. preration progarm: 1、plug into USB tray. 2、press the power switch down,the pilot lamp light. 3、press the play key,lamp of the USB tray and play bicker,you plug into earphone or tune up radiogram to 88.1MHz,you can listen the music. 4、if you want to pause it you can press the play key again,if you want to listen the next song, you can press the selected key.if you want to augment the volume,you can press the volume key. 5、if you want to stop it,you can press the stop key at first,then pull out the power switch, otherwise you can attaint USB tray easy. wireless MP3 afford the same sound level as CD,you can enjoy the high taste sound via it. it not use compact disc,and it can edge out CD walkman,you not only can save your the money to buy compact disc, but also can download the song freely anytime,as you know,there are more 500 thousand songs over internet, you can use it freely,and you can do your music by yourself,combination the content and order of music, additions and deletions it randomly,and you don't buy a full CD because you like one or two song on it. preration progarm: 1、plug into USB tray. 2、press the power switch down,the pilot lamp light. 3、press the play key,lamp of the USB tray and play bicker,you plug into earphone or tune up radiogram to 88.1MHz,you can listen the music. 4、if you want to pause it you can press the play key again,if you want to listen the next song, you can press the selected key.if you want to augment the volume,you can press the volume key. 5、if you want to stop it,you can press the stop key at first,then pull out the power switch, otherwise you can attaint USB tray easy.