Ensure eye health and working posture, effectively reduce eye strain and physical fatigue, and improve work efficiency. It is a portable book and more everything whatever for students, employees or family. Easy to take anywhere, as a send-off gift for students, colleagues, friends. Made of high quality ABS material, safe, durable and non-toxic to use. With adjustable angle, extendable arms, high thickness clamp, foldable and compact shape, let users and page keep a more comfortable and correct viewing angle the users seat. About Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and well make you feel satisfied.