A tight seal blocks ambient noise, so you can concentrate on the accurate audio reproduction, and aptX HD decoding is available with an optional component upgrade.

Shure’s SE535 in-ear headphones sound great and are quite accurate, facilitating EQ  to suit just about anyone’s taste. But these puppies will set you back a minimum of $449—or between $499 and $599 if you choose one of the Bluetooth options (street prices are somewhat lower).

Shure sent its Bluetooth 4.1-equipped model SE535LTD+BT1 ($499 at Amazon), along with its RMCE-BT2 Bluetooth 5.0 upgrade module ($149 at Amazon). The optional module adds support for Qualcomm’s aptX and aptX HD codecs, which are generally thought to be sonically superior and more efficient than the SBC (subband codec) native Bluetooth uses.
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https://www.techhive.com/article/3327567/headphones/shure-se535-review.html