If your Treo smart phone pulls double duty as a phone and an MP3 player, then the 2-in-1 Stereo Headset Pro is perfect for you! This fully functional smart phone headset is specially designed to deliver amazing sound quality for digital audio content. Enjoy your favorite tunes with rich, dynamic stereo sound through the high-performance earpieces. Got an incoming call? Switch instantly to call mode with the touch of a button right on the microphone.¤¤In-ear, ultra-soft silicon ear tips keep unwanted sound out, maximize comfort, and minimize ear fatigue.