It's motorcycle mp3 audio anti-theft alarm system. 1)Free music 2)It has the function of alarm and mp3 Motorcycle mp3 audio anti- theft alarm system features:1)Set anti-theft alarming/Release anti-theft alarming/Vibration alarming2)Hi-fi FM function and MP3 sound effect3)When you drive the vehicle,you can enjoy the music4)Machine body is made of all aluminum alloy5)Two speakers ,the alarming speaker and the music speaker is together6)Download the music to micro SD card,you can truely enjoy the free music Technical Parameters:1)Voltage: 12V2)Dymamic working current:<100mA3)Static working current: <4.5mA4)Music playing current:<2A5)Speaker loudness: 125db(+-5db)6)Range of working frequency:433MHz(+-0.5)7)The loudspeaker size:2.5inch The steps you should do is very easy:first ,download songs to micro SD card.Second,insert the card to the mainframe.Third,start to have fun.                                 two remote controllers                              two music and alarming speakers                   we have other colors,you can choose any color you like.                       you can insert micro SD card here.                          the inner package                company information                      

motorcycle mp3 audio anti-theft alarm system