... ROHS,FCC,CB,ISO 2.Rechargeable battery 3.MP3 input 4.Suit for teacher, tour guide ,promo action , ... amplifier :When connect the computer or MP3 with the cable , the music volume could amplified by this mini amplifier ... have function such as FM Radio, USB/TF/MMC input ,music reverb and telecontrol etc.Please feel free ... microphone 3.Charger 4.Waistband 5.MP3 input cable6.Manual FACTORY TOUR CERTIFICATES