Share the fun with Plantronics MIX 20Z mobile stereo headset. Use the 2.5mm connector for most mobile phones and the included 3.5mm adapter for MP3 players, laptops, and portable gaming devices. Have a friend plug into the 3.5mm sharing connector and let the fun begin. It is great for road trips or just hanging out with friends. Comfy sound isolating earbuds in three sizes fit your ear perfectly and reduce background noise so you can concentrate on your conversations, tunes, games or movies.