Innovative Design:Combining functionality and convenience, this bookmark doubles as a reading light. Crafted from plastic,making it slim enough to mark your page without damaging your books. Efficient Power Supply:Equipped with a long-lasting Battery, this LED book light provides a consistent 4000k warm light, ideal for reading without straining your eyes. Versatile Use:Not just for books,this LED bookmark can be used with magazines and eReaders,providing flexibility for all your reading needs. User-Friendly Operation:Activate the light with a simple flip, making it easy to continue your reading session into the night. The warm light illuminates your pages, creating a comfortable reading environment in any lighting condition. Idea:Ideal for any occasion,this bookmark light is a thoughtful gift for book lovers.It's an excellent choice for birthdays,Christmas,Father's Day,and Mother's Day,offering both practicality and of luxury to everyday reading. Power supply:built-in battery (a button battery) Voltage:less than equal 36V (V) Switch type:push button Colour: Material:plastic Package Contents: 1 x Bookmark lamp 10 x button batteries 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 +/- 1-3cm.