These true wireless earphones have been designed to offer optimal user comfort. The Google Fast Pair feature lets the earphones pair to a smartphone simply by bringing them close together. Three communication technologies — MCSync, LDS antenna, and BT Class 1 output — minimize sound interruption, even in crowded areas. The hourglass-shaped housing was designed in response to data on ear shapes. The rear housing in a minimalist design offers a good fit and strong aesthetics. The charging case has an ergonomic design that can be opened and closed with one hand.