GS-S2 EARCORE ME earbuds help protect hearing and awareness as well as communication in kindsof sporting activities and working place. Its advanced level-dependent noise reductiontechnology helps provide hearing protection in noisy environments while enablingenvironmental listening in quiet environments by allowing users to switch among 5different modes to meet personalized hearing protection needs under differentscenarios .Equipped with new generation Bluetooth,the earbuds can connect to amobile phone or any portable devies with Bluetooth to answer the phone calls or radiocalls and llisten to the music.This electronic earbud equipped with charging case can berechargeable via type-C USB cable,fully charged time is less than 2 hours and it can last16 hours for long-term use.