ergonomic design for chair, very easy to install. Reduce Stress from cervical vertebrae, shoulder, arm and wrist; keep correct posture, avoid cervical vertebrae ache, mouse hand and nearsightedness Unique design prevents mouse from sliding down, memory foam wrist rest protects your hand from hurt. Built-in Buckle seat belt, can be mounted on a chair, more secure, , prevent falling off,Away from the wrist occupational disease, make your life more beautiful. 18cm increase mouse pad, super large area. Exquisite workmanship. Perfect for: home and office colour:black material:ABS size:22*48cm Package Contents: 1 * Chair single mouse pad Only the above package content, other products are not included. Note: Light 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.