M338A Introduce: 1:Play/Transmitter Freq/Volume displayer 2:Forward music/Freq Minus/Voice Minus 3:Play/Pause,Freq memory 4:Transmitter Frequency adjustment 5: USB Socket 6:Next music/Freq Plus/Voice Plus 7:2.5"audio input socket 8:Power plug 1. Build-in flash 128M / 256M / 512M / 1G / 2G selected. 2. Power on auto play, don抰 need any change your lovely car 3. Digital display music menu, Freq, Volume. 4. Play music/Transmitter FM Freq/Volume memory function. 5. 87.5-107.9MHz, more than 29 frequency point you can selcted. 6. 9~16V Car Smoker DC power. 7. Audio input function. 8. Support MP3/WMA/USB2.0 format