... charger,golf car charger,and so on,megaphone,amplifier,speech amplifier,guide amplifier,car megaphone,mini audio and professional power amplifier . ... microphone and heading-microphone.and so on. Applicationteacher,tourist guide,public broadcast,market promotion,small meeting,summer camp,auction ... and tear waistband. NOTE: you can choice diffrent color megaphone.THANK YOU VISITE.User's Manual:1,you find ...