... ,and let the pedestal touch the surface tightly. Technical Parameter Input DC Voltage: DC 5V±0.5V Inlayed Lithium battery:600mAh ... -18000 Hz Power Source:PC, MP3, MP4, MD, CD, DVD player, Mobile phone,etcProduct Size: 83*77 mm Products Weight: 340gColor ... 1 cable(one for 3.5mm audio cable,another for USB cable)User manual vibration resonance mini speaker