Mini Tourism music MP3 speaker 1.suitable for the computer,PDA,,iPhone 4,the handset, ... MP3, MP4, mobile phone, PC, etc. 5.External high-performance rechargeable lithium-ion battery. 6.Multi-function keys: volume, selections, modes ... power:3W*2(RMS)2.Frequency:100Hz-18KHz 3.Inside speaker:3W*2 4.Input power:DC 5V 500mA5.Audio signal ...