1. Protable mini boom speaker- Teeny Tweakers -Tiny pocket size with room ... 1.high end portable USB Mini speaker for mp3/mp4/iphone, Mini USB speaker ,Work with all sound source ... ,Computer ,mobile phone ,CD player etc, Protable mini boom speaker- Teeny Tweakers -Tiny pocket size with room filling sound2.3 ... audio plug ,connects to Ipod, Frequency range:90Hz - 20 kHz,Output :2.5W+2.5Wm,distortion: 0.3% ...