Packing list: fashionable and practical, can be fixed to the sides and vertical pages of books; Dimensions: soft and elastic. It is not easy to fade after long-term use and can be washed; Smart design: The bookmark can automatically follow you to turn the pages and remember the pages you have read very well. This is a very practical function. You don't have to worry about forgetting the pages you have read or studied; Wide range of applications: suitable for students, writers, etc. This smart bookmark helps you mark book pages and insert them into novels, textbooks, magazines, diaries, newspapers, etc.; Best gift: The smart reading tracking bookmark is the best gift for friends and family, not only as a bookmark, but also as a gift card, decoration, etc. Material: silicone + metal Color: multicolor Package Contents: 6 x smart bookmarks Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.