The 4Vu Privacy Screen uses tiny vertical blinds on the surface of the privacy screen, which narrows the viewing angle, so data is only visible directly in front of the monitor and up to 30 degrees away in any direction from the center of the screen. You have full clarity and visibility, while onlookers or passersby see only a black screen. Each 4Vu screen has three convenient options: a magnetic hinge attachment that attaches to the top of the privacy screen to create a seamless on/off experience; long adhesive strips that stick directly on the LCD screen for a firm, fixed hold; universal flexi-hinges that attach to the top of the privacy screen and monitor with an included adhesive lift tab. Ideal for touchscreen applications, each 4Vu privacy screen features Targus DefenseGuard Protection, a protective coating that does not wear off and lasts for the product's life. This creates a cleaner touchpoint surface and works continuously to keep your screen safe. Targus 4Vu privacy screens have an anti-reflective coating that reduces glare and improves light transmittance under most viewing conditions. This results in brightness that's up to 12.4% higher than other privacy screens for comfortable, clear viewing. Compatible with MacBook Pro 13" (2019/2018/2017/late 2016) and MacBook Air 13" (2020/2018). The privacy screen has a viewing angle of 30° to each side so that onlookers will see only a dark screen as they pass by. Anti-glare screen coating and blue light filtering help to reduce eye strain. This portable privacy screen protects valuable information at the office and on the go.