Each ear bud has an embedded microphone to enable 360 (degree) binaural recording, great for large lecture halls or conference rooms. Compatible with Echo™ smartpen only. * Binaural recording precisely captures everything you hear around you. * High quality, anodized aluminum earbuds isolate external noise to deliver crisp, clear sound. * Ideal for long-distance recording & playback in large lecture halls, conference rooms, or noisy environments. *
Includes:: three pairs of different rubber earpieces for an optimal fit.