1,heavy bass 2,usb plug for power 3,fashion design 4,mini speaker for laptop, PC. Future:*Portable speaker optional for PC and note book*Built-in active amplifier*USB bus-powered capability, no adapter required*Pure and elegant sound quality *Conveniently powered via with USB cable*Easily control volume with VOC on the back*Durable for long-term use *Size:71x72x117mm, weight: 0.6kg*OEM color and ...