... 8 ohmsSpeaker unit: 57MM x 2Power supply: DC9VMax. remote control distance: 7mSize: (L)275mm, 61MMColor:silver ,black,pink,blue,green Packing ... information1PCS/White BOX 20SETS/CartonN.W.:13KGG.W.:15.5KGMini Sound I-dop MINI Speaker i-dop mini speaker Specifications: 1.high quality 2 ... power:10W(5-6Ω impedance) Sensitivity:80DBA kind of special speaker, but there is no sound device inside. It depends ...