SMALLER FIT EARBUDS: Smaller than a credit card, the Go Pop+ buds case fits in your pocket and the Bluetooth earbuds are our smallest yet; 15% smaller and 40% lighter with the small case, than the Go Air wireless earphones. Ideal for the gym, sport or to carry while running. Try the three tip sizes to get a snug in ear headphones fit and creating a perfect seal for crystal clear sound Hybrid ANC Up To 48 dB + Transparency Mode: Environmental and Adaptive ANC for better focus, with quick awareness mode when needed