Secure active fit - Compact design tested for secure fit with extra grip coating. Waterproof durability - IP57-rated protection against dust and sweat, with a 2-year . | More power, more freedom - Up to 7. 5 hours battery and up to 28 hours with the charging case. | Stay safe when you exercise outside - HearThrough mode lets ambient noise in and allows you to choose how much background noise you want to hear. | Your music your way - Make sure your music always sounds exactly how you like it with a customizable equalizer, available in the Jabra Sound+ App. | Great calls, anywhere - 4-microphone technology for excellent call quality, wherever you are. Easy access to your voice assistant - Direct access to Alexa, Siri and Google AssistantTM.