Share songs with your friends legally! With the Starfire headphone splitter hub; connect up to five sets of headphones, ear buds, or earphones to your MP3 player, smartphone… virtually any device with a 3.5 mm output or RCA analog output when used with an adapter. A 4″ stereo male-to-male 3.5 mm cable is included for quick, smart connection between your source device and the Starfire headphone hub. Nickel-plated terminals increase conductivity while minimizing corrosion. Dimensions: 2″ dia. x 0.5″ H.