Connects to our devices super fast. However I need to return these due to they are to small. Didnt do anything crazy with them. :)There also isn?t a weird hum like my last usb hub. It was great to start with but not anymore. This shoe holder is absolutely perfect and believe me its worth it to pay a little more and have it last a long time rather than go for cheaper and replace it over and over again because it breaks easily. Super fun and ready to be used with the only limit the imagination. They last like 4 hrs and the case gives like 2 full charges. so comfortable and waterproof :) I wear this shoe walking 12-18 hours in Japan and it was comfortable ! I can?t even tell how perfect these are.