... (can show song,time,recording,calendar,alarm clock)3,Li-on battery;7.4V 2200mAh/rechargeable4,Support;U ... ,TF card,FM,Suitable for devices equipped with a 3.5mm audio jack, including cell phones, MP3 players ... and computers.5,Re-charging timeL 3-5 hours,music playing working hours 8-40hours, speaking ... market FM megahone with LCD display screen and remote control wireless megaphone