Denon PerL Pro True-Wireless Earbuds - Manual (Page 23)

Lossless audio & Audio codecs
Your Denon PerL Pro will automatically use the highest quality audio
codec that is supported by the connected device. To experience Lossless
Audio over Bluetooth, simply connect your earbuds to a source device that
supports Qualcomm aptX Lossless. Please check the manual of your
source device for compatibility.
Denon PerL Pro supports the following codecs:
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aptX Lossless (44.1 kHz/16-bit)
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aptX Adaptive (up to 96 kHz/24-bit)
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aptX Classic
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AAC
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SBC
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