Livescribe Sky/Echo 3D Recording Headset Record in high quality stereo; Ideal for lecture halls and conferences These light-weight earbuds feature embedded microphones - ideal for recording high quality stereo audio in lectures, seminars or meetings Precisely record everything around you in 360 binaural audio, then listen to your recordings in private Designed for the Livescribe Sky and Echo smartpen; Not compatible with Pulse smartpens