I should have paid closer attention to worded description. I wear them strictly at home, as much as possible, from the moment I get out of bed. The cord we received appears to have been used and has a lot of static. This was for my sister in law and she finds its also great for back support. The 24 month warranty is far better than mostFor just over $20, this 30w PD model is compact and great for travel with its foldable plug. I recommended them to my brother which he purchased and loves. One told me I have to wait another 48 hours and GUARANTEED me that I will get the e-mail with the code. I bought it fir the clamps but it?s useful for any use Speakerphone works well. Das Smartphone kam gut verpackt sowie original eingeschweißt an.