Description: 【Book Riser Holder with 360° Rotating Base】: Effortless 360° rotation allows you to adjust your book to any viewing angle, great for drawing, studying, or video calls 【Adjustable Height and Tilt】: Double axis mechanism enables both height and angle adjustment, ensuring comfortable use at any position or desk setup 【Stable and Silicone pads】Upgraded wide and thickened base with anti slip silicone pads provides stable support—no shaking, slipping, or tipping over 【Book Holder with Hollow Design】: Precision engineered carbon steel frame with ventilated back panel promotes efficient heat dissipation during extended use 【Universal Book Stand】Universally for devices from 4" to 12.9", including book, smartphones, and others; foldable design makes it easy to carry anywhere, ideal for home office travel Specification: Material: Carbon Steel and Silicone Size Chart: screen support: 15cmx11.6cmx3cm/5.91inchx4.57inchx1.18inch base: 13cmx10.2cm/5.12inchx4.02inch Package Includes: 1 Desktop Book Stand Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.