... *8.5*8cm 2. Cute design Portable USB Mini Pig Speakers 3. Suitable for computer, mp3, mp4... SpecificationsUSB Mini Pig Speakers1 ... , mp4, mobile phones; 5. Voltage of 6 V, 6. External usb power, 7. 4.5-6-volt transformer;8. The product structure using ... and stereo effect, compared with the same kind of mini-speakers, the effect is excellent