To prevent the glasses from sliding out of the headband loop, fold the arms before letting it hang on your chest.
The glasses include test card
What should you do if you don't receive my item in promised time? Please contact us for checking shipments. If you can't receive it, we will release full refund or resend new one to you. We are reliable seller, so don't worry about this
If the products have problems how to do it?
Please contact with us in time, we will help you solve it. Please feel free to contact us .so that we can do our best to resolve any problem that might come up immediately, and we appreciate the opportunity to have a fair transaction. Just be open-minded!