PERSONALIZED SOUND - The Denon PerL True Wireless Earbuds, with Masimo's intuitive technology (AAT), provide a highly customized listening experience via the Denon Headphones App. Create a custom hearing profile to cater to your unique hearing abilities MASIMO ADAPTIVE ACOUSTIC TECHNOLOGY - AAT lets you create a unique hearing profile perfectly tuned to you by analyzing very faint sounds - otoacoustic emissions (OAEs). These wireless earbuds then sonically shape your music & deliver the detail you love DENON SIGNATURE SOUND - Hand-tuned by the Denon Sound Master to deliver the vivid and spacious Denon signature sound audio experience. With 5 tip options & 2 wings, these wireless earbuds stay in place comfortably, so you can keep the music going all day NOISE CANCELING EARBUDS - In Quiet Mode, tune out world distractions with active noise cancelation technology, or choose Social Mode to hear your surroundings. Immersion Mode lets you adjust the bass level for your music genre & preference CUSTOMIZABLE TOUCH CONTROLS - Each wireless earbud has 4 fully customizable touch inputs to let you control play/pause, skip track, change volume, and more. They are also great workout earbuds with an IPX4 sweat and water-resistant rating LONG-LASTING BATTERY LIFE - When out of the case, the Bluetooth earbuds offer 6 hours of playback on Normal Mode (mixed usage of ANC, spatial mode, multi-point & 50% volume), and 18 hours of power on Low Power Mode (all features off) in the charging case OVER A CENTURY OF AUDIO INNOVATION - Our dedication to groundbreaking sound innovation has cemented Denon's reputation as a visionary and a tastemaker, not only with our customers, but with our partners and competitors