Massive Playback Time: It offers a playback time of up to 20 hours with the case, including up to 4 hours of playtime per charge. It has a long stand-by time of up to 140 hours. ♬ Bluetooth v5.0: pebble Duet Pro offers true true wireless experience for real-time audio with Bluetooth v5.0. ♬ Impactful Sound: Equipped with a 13 mm speaker driver, these earbuds ensure powerful and crystal clear sound while gaming, watching movies, or listening to your favourite songs. ♫ IPX4 Sweat and Splash Proof