40-HOUR BATTERY LIFE. Once fully charged, the Bluetooth earbuds will sustain up to 9 hours of listening, and when charged multiple times with the case, they can support up to 40 hours of listening COMPACT AND COMFORTABLE TO GRIP. Each earbud weighs as little as 3.8 g, and is designed to create a snug fit, thanks to +300,000 ear canal samples and ergonomic simulation-based analysis. 3 HOURS OF MUSIC PLAYBACK ON A 10-MINUTE CHARGE. Charge the earphones for 10 minutes before your commutes, and enjoy your favorite music for 3 hours. ROBUST BLUETOOTH 5.3 CONNECTIONS: Robust Bluetooth 5.3 connections keep sound and image in sync, for immersive viewing and gaming. Enjoy clear calls and excellent music sound ROBUST BLUETOOTH 5.3 CONNECTIONS: Robust Bluetooth 5.3 connections keep sound and image in sync, for immersive viewing and gaming. Enjoy clear calls and excellent music sound