Only supports the bare minimum LTE bands to work in the US. To compare I previously had a pair of Sony WF-1000XM3s which are at or near the top of a lot of youtube earbud reviews. So disappointedI only wear under armor slidesBut these are uncomfortableAnd not like the slides in the past. This product doesn?t fit fully in the hole, as a result it broke my $140 beats headphones. The product was everything I wanted, but didnt have staying power after 4 months. The cord is heavy duty and durable. they shipped together and very quickly was packaged very well. But when the replacement came, it exhibited the EXACT same issue. I feel like the wood version would have been more complicated for us to modify but would have been worth the effort if I wanted a long term and more finished / polished / high end look. Took them out.