This filter has an elegant, lightweight design that enhances any monitor. Adjustable magnification more than doubles character size. Uses a high-quality Fresnel lens with antiglare coating. Fully assembled. Installs quickly and easily. Patented. Includes microfiber cleaning cloth. Diagonal Monitor Size: 21.5" to 22"; Fits Device Type: Flat Panel Monitor; Frame Type: Flat Frame; Mounting: Hanging.