cube aluminum case, support usb drive, TF card 1.Output: Rms 3W(3W*1), frequency:150-18000HZ, Signal ... rechargeable lithium ion cell 4.Read mp3 files from TF card and USB drive, 5.Can be used as USB drive ... when plug TF card in6.color: Black, silver, blue, pink, green gift box40pcs in ...