Denon Perl Pro True Wireless Earbuds let you create a personalized sound profile via Masimo AAT for audio that is perfectly tuned to you. Add in CD-quality sound from Qualcomm aptX lossless technology and spatial audio from Dirac Virtuo for an unrivaled wireless audio experience. Confidently take calls with best-in-class voice audio. Use the Denon Perl Pro app to create your profile and fully customize your listening experience. And with eight hours of earbud battery life-plus 32 additional hours from the case and wireless case charging-you can keep the music going all day.