... ,FM radio,USB 3.Rechargeabl li-ion battery 4.Micro SD/TF 5.Christmas gift Portable Mini Robot Speaker for MP3,MP4,TF card ... to carry. 6. Built-in 800mA battery capacity, play 4-5 hours! Good traveling companion. 7. New experience: More simple, more convenient ... , impressive sound quality, compact and utterly portable -Built-in 800mAh battery, a sound standby time, 4 to 5 hours of working ...