They look like you would hope and they will all work in a month or so. It's better than many others. We don't have it easy with them, so sooner or later they break and I'll probably buy the same ones again.
Pros
Better service than other stores: If there is any quality problem, we promise to refund or send a new replacement within 30 days from the date of purchase. If you have any questions, our customer service representative will solve your problem within 12 hours. Please contact us.