Designed with 3-port, this compact USB 2.0 high-speed hub is small enough for travel, and capable enough to meet your connectivity needs. It is also a highly flexible audio interface, which can be used with laptop system; Simply plug the sound adapter into your USB port, and then plug your headphones into the adapter. Designed with 3-port, this compact USB 2.0 high-speed hub is small enough for travel, and capable enough to meet your connectivity needs. It is also a highly flexible audio interface, which can be used with laptop system; Simply plug the sound adapter into your USB port, and then plug your headphones into the adapter. It is also a highly flexible audio interface, which can be used with laptop system; Simply plug the sound adapter into your USB port, and then plug your headphones into the adapter.