... tone4.Applicable for PC,DVD,Mp3,iPod,PSP,cell phone etc,and other audio output device5.Accept EOM/ ... Technique parameters:1Model:v22Channel:1.0ch3Speaker Specifications: 2 OHM4Output power: 3W5Frequency response: 90Hz-20KHz6Sensitivity: 80db±2db7Distortion: ≤0. ... and replaceable lithium battery9Input Power : USB power 5V and lithium battery10Applicable for : PC,DVD,PSP,cell phone,Mp3,vedio game,ipod ...