Specification Installation pitch: 92 mm wide Installation hole: 83 x 20 x 38 mm Overall dimensions: 107*25*38mm/ 4.21*0.98*1.5 " Input voltage:7-12V Descriptions 100% brand n_ew and high quality support bluetooth (Bluetooth3.0 EDR) (after been paired with mobile phones can realize wireless music play) support USB/TF/Bluetooth/FM/LINE ,WAV lossless music decoding chip. support USB/TF card switch,PREV,NEXT,fast forward,fast rewind, volume,EQ,play/pause,stop,single repeat,mute, shutdown and direct election. support Bluetoot PREV,NEXT,volume,EQ,play/pause,mute,turn it off. support FAT16,FAT32 file system.Support for MP1 Layer3,MP2 Layer3,MP3 Layer3 version of the song. Support 32-320 KBPS MP3 songs. support power off memory function: memory play songs and volume before power off. Note: Non-smart phones (android) have to enter the passw_ord - 0000 Decoding board play mode instruction Decoding board in the absence of memory card or U disk,boot default to "audio input" mode,the