... ; you can connect this cute mini speaker with your computer, laptop, iPhone, iPod, DVD, CD, MP3, MP4, mobile phone, GPS, PSP ... lithium battery. Powered by computer USB port or through a power adaptor.Come with a flexible USB & Audio cable.High grade ... %Frequency response: 150-1800Hz (±3dB)Signal and noise ratio of power amplifier: ≥80dBLoudspeaker: 1.77" (external diameter 45mm)Inpedance: 4ohmsPower ...