Diamond-Inspired Drivers: Liberty 2 produce sound with flawless accuracy and treble that sparkles full of detail. Up to 32 Hours of Playtime: Enjoy 8 hours of playtime on a single charge and extend to 32 hours with the charging case. HearID Technology: HearID maps your hearing sensitivity at multiple frequencies and intelligently analyzes the results to give you a truly personalized listening experience. Rock-Solid Fit: Soundcore’s proprietary GripFit technology ensures the earbuds sit securely and comfortably in your ears—simply slide in and twist to lock. aptX Technology: Ensures Liberty 2 wireless earphones receive sound with the highest possible quality when streaming from a Bluetooth device.