Darkening privacy filter is designed for 12.5 wide-screen laptops to provide worry-free privacy wherever you work. Advanced microreplication technology creates an excellent viewing experience on your high-resolution display. Incredibly slim privacy filter offers amazing screen clarity and advanced visual privacy protection. Whether you're working in an open office floor plan, on a plane, on a train or at a coffee shop, viewers from either side of your laptop will see a darkened screen, helping keep your information secure and out of sight. Privacy filter also protects your display from elements such as debris, dirt and scratches as well as help minimize screen glare, fingerprints and reflections for an enhanced viewing experience. Lightweight, thin, frameless design reduces 35 percent of blue light transmission from the display. Attaching, removing and reattaching are simple and easy. Aspect ratio is 16:9.