The RP-BTS10 adapts naturally, offers rich bass, and weighs only 22 grams. This ensures a great sound experience even during the most demanding workouts. Thanks to the quick-charge function, it is ready to use in no time and won't let you down just before your training. The annoyance of discovering that the earbuds' battery is empty right before your workout can be quickly overcome. With a charging time of just 20 minutes, the BTS10 is ready for 60 minutes of listening and sports enjoyment.