Features: Basic information: including sliding ruler, metal book board, clip, book holder, metal technology, simple and generous. Design: ergonomic design, correct children's reading posture and prevent neck fatigue by adjusting the angle of the support. Detail display: it has multiple gears and can adjust a variety of use angles. The sliding ruler can mark reading and typing progress and can be disassembled. There are anti-skid rubber pads for anti-skid. Applicable crowd: it can be used for all kinds of reading books, suitable for students, office staff and the elderly. Product material: made of high-quality plastic and metal materials, solid and durable，there are anti to skid rubber pads for anti to skid. Specification: Material: Plastic + Metal Color: Black Size: Approx. 35*21cm  （13.8*8.3 inch）  Package List: 1 x Bookstand Features Basic information: including sliding ruler, metal book board, clip, book holder, metal technology, simple and generous Design: ergonomic design, correct children's reading posture and prevent neck fatigue by adjusting the angle of the support Detail display: it has multiple gears and can adjust a variety of use angles. The sliding ruler can mark reading and typing progress and can be disassembled. There are anti to skid rubber pads for anti to skid Applicable crowd: it can be used for all kinds of reading books, suitable for students, office staff and the elderly Product material: made of high to quality plastic and metal materials, solid and durable，there are anti to skid rubber pads for anti to skid