Both look to be able to connect to two devices simultaneously - something I read was proprietary to Bose, but clearly is not. I have noticed fine details like a singer breathing before or in between singing. Great looking slippers and supper comfy. The material feels nice, it fits perfectly with enough room for my feet and theyre very comfortable however when its wet it makes this squeaky sound just like those dog toys every single time I walk. just wish the ledge size was larger. Purchased this over a Park Tool 10. These are also a really nice colour (save yourself money by having this colour instead of the grey). It matches my marble phone case. Suola in memory divina. These Sandals are just too cute!