Light Weight, easy to take alongSpecifically for headsets with mic capabilityOvercomes the limitation of some laptop audio ports, by turning a single 4-position 3.5mm audio port into two distinct 3-position 3.5mm audio ports, allowing you to connect a microphone as well as external speakersAllows the use of older audio accessories with newer computersCan be used with any portable device that uses a 4 position 3.5mm jack