Features: 1.Cool and cute speakers: You can share great sounds with friends or family. 2.Compact and lightweight: You can put this portable speaker in your bag. 3.This USB speaker gives you an ultra-portable mini sound system. 4.Enjoy music without headphones or large wires for external speakers. 5.Power is supplied by plugging the USB power cord into almost any USB port, or by connecting to an AC outlet adapter (not including an adapter). specification: Cool and cute speakers: You can share great sounds with friends or family. Compact and lightweight: You can put this portable speaker in your bag. This USB speaker gives you an ultra-portable mini sound system. Enjoy music without headphones or large wires for external speakers. Power is supplied by plugging the USB power cord into almost any USB port, or by connecting to an AC outlet adapter (not including an adapter). No charging function, only work through the USB port. Suitable for PC, MP3, MP4, laptop. : Material: Plastic Color: Black Audio Track: Dual track, Single track (optional) Output power: 3W x 2 Impedance: 4 ohms Frequency response range: 90Hz - 20KHz Signal to noise ratio: 60dB Distortion: 0.3% Power: USB / DC5V Package list: 1 * Pair of Speakers Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.