They are cheap, seem to be okas far as quality, and they clip easily on the ears and they are extremely comfortable to use while sleeping. I received doubles of this item. 1A or unattended long duration of charge exceeding 30 mins. Easy and secure for my daughter to put on by herself. Tal y como indica descripción ) There are plenty of holes for the 1/4" bits, so if you have wide bits and need to skip a few holes to fit them all in, you should be good. but I was WRONG! DO NOT ORDER THESE SHOES, THEY WILL NOT FIT. BTW, if you are new to ballet (which we are), I discovered that my daughter is the rare child in her class with black ballet shoes. Size:TINY!