Thank you very much for choose us.Cell phone ring holder allows your hand to relax while securely holding your phone - never drop your phone again from lost grip.Good quality and useful£¡The strong 3M reusable sticker on back allows you to place it anywhere on your device, and replace any time you need, For best results put it on to a smooth, clean surface free of any dirt or oils. It is recommended that once you stick it to your device, to press it at least 10 seconds, and do not move ring holder at the first 24 hours, so that it will sticker firmly.