Denon PerL True Wireless Earbuds With Active Noise Cancellation AHC10PLBKEM - BlackDenon PerL True Wireless earbuds let you create a personalized sound profile via Masimo Adaptive Acoustic Technology (AAT) for audio that is perfectly tuned to you. They're hand tuned by the Denon Sound Master to deliver a vivid and spacious sound quality. Your music tuned your way We all hear differently, so why listen the same way? Denon PerL measures your ears' response to sound, then creates a custom listening profile to match, redefining