Long Battery Life Small size has long endurance. Super long endurance. Support multiple charging of earphone without false mar. 12 hours single use. 48 hours total endurance.Double label HD call Low frequency elongation excellent analytical power. Bring you a powerful and natural music experience. Play without delay The link is stable and continuous line, playing the game to listen to the voice position hd video ultra low delay audio and picture synchronization. Bluetooth 5.0 fast connection technology bluetooth 5.0 high T input provides high decode HIFI sound quality and uninterrupted call experience. Wear comfortable without pain Low frequency extensibility excellent analytical power, bring you strong and natural music experience.