The scroll wheel LED should start flashing. Im on the first set of hooks, so Ill be able to waist train in this beauty 3 more hooks. Very glad I bought them so far. Trooooop bien solide les meilleurs sur amazon je recommande les yeux fermés There was a side zipper but I find that they are difficult to zip up so I skipped using it. Challenges social stigmas in a confrontational way. Nice seller and nice birkenstock. I use them for work calls and for gaming. We will see how they hold up after the test of time. At $299 it would be expensive but worth it.