How to set the code lock: Creative metal password lock,adding a trace of fashion sense 0-9 Three-digit combination, Thousandsof password combination, a good degree of confidentiality. We put an instruction manual inside our package.If you cannot open the code lock or forgot your password, Please Contact us. Thoughtful Design: we adopted eye protection paper with no fluorescent agent to better protect you and your child's eyesight. refillable design by using waterproof leather which can be removed for replacement. each diary has inner pockets on the first and last pages where can put some stickers or postcards. Diary Details: 200 pages/100 sheets; A5 Paper size/Line spacing: 8.5 *5.9 inches/ 0.35inches, one ribbon bookmarks, a elastic strap closure and a sturdy password lock. The diary size bigger than the average lock diary. Perfect Constellation Diary: Durable for travel or personal secret diary .a must-have item for a diary, travel journal, poetry work, creative writing, listing ideas, making sketches & drawings. You can use it as a constellation or birthday gift for the special one in your life, keep his ideas, experiences and memories last forever, to catch the eye of your friends, family and colleagues. GUARANTEE: If you have any questions or are not satisfied with our products, please contact us.