1.Big sound level 2.Rechargeable battery 3.Accrssories: Microphone 4.Suit for teacher, tour guide ,promo action ,army ♦ABS cover♦ Amplify your sound when guide, promotion, army, etc♦FM radio function with high sensitive ♦Line-in&3.5mm jack, support U-disk,TF card music playing♦Support PC, Iphone, Blackberry, ipad, mobile phone acoording to 3.5mm jack♦Support PC, Iphone, Blackberry, ipad, mobile ...