Mini mobile phone speaker 1.USB power 2.support TF ... mp3,mp4,mobile,computer,for iphone. Mini mobile phone speakermodel number:MA82761.Digital MP3 Player: TF card ... external audio input: support for MP3, MP4, mobile phone, PC, etc.5.External high-performance rechargeable lithium ... 2(RMS) 2.Frequency:100Hz-18KHz 3.Inside speaker:3W*2 4.Input power:DC 5V 500mA ... MSN for the inquiry. Mini mobile phone speaker