... iPhone, iPad, tablet PCmobile phone, PSP,UMPC, MP3/4... 3 5 mm jack speaker mini usb audio player mp3 mini speaker usb mini ... to iPhone,iPad,MP3 or any other music source via 3.5mm jackSpecifications:Loudspeaker: D28mm*1W*2Power supply: 2*AAA batteries ... : 200Hz ~ 20KHzS/N: >70dBSize: 72(L)*30(D) mmWeight: 40g 3 5 mm jack speaker