Please note do not have manual or know how display works. Bought for husband after knee replacement as recommended by surgeon. This product is ideal for those looking to enhance their strength and flexibility while seated in a chair. By providing resistance and support, the Manual Chair Exerciser allows users to perform gentle exercises and stretches to promote overall health and well-being. Perfect for individuals recovering from surgery, injury, or mobility limitations, this product offers a convenient and effective way to regain mobility and build fitness.