Palm Stereo Headset Easily switch between listening to music and accepting calls with 2-in-1 headset Enjoy your favorite tunes with rich, dynamic stereo sound 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 Compatible with the following models: Treo 755p, Centro, Treo 750, Treo 700p, Treo 700w, Treo 700wx, Treo 680, Treo 650