Open-Ear Design hear your music and the world around you True Wireless Bluetooth 5.4 Up to 11 Hours Playback (up to 48 hours with charging case) Fast Charging: 10 minutes = up to 2 hours of use Built-In Noise-Canceling Microphone for clear calls Dual Device Connection connect to 2 devices simultaneously Water Resistant great for workouts and daily use Lightweight & Comfortable for extended wear Automatic On/Off for convenience