These blinds operate on a simple, smooth roller mechanism. As you pull the operating chain or use the wand, the dual-layer fabric moves up or down. Because the layers are linked, the stripes shift relative to each other. When the opaque stripes line up, they block the view and light; when they offset against the transparent stripes, they allow light and vision through. This gives you precise, fingertip control over your home’s light levels throughout the day.