Sight and sound, synced. Sonic 2 takes the Revo smartglass experience to the next level with a sporty wrap silhouette, immersive audio powered by RevoWhisper™ tech, and our signature NASA-based polarized lenses. These sunglasses take your calls, stream your music, and let you enjoy a clearer view of the world – and the all-day battery life means you’ll never miss a beat.