Lenovo 13.3-inch Bright Screen Privacy Filter for X13 Gen2 from 3M for ThinkBook 16 Gen4 from 3M offers world class privacy without substantial tradeoffs in brightness or security. On average, 25% brighter than the standard 3M black privacy filters. Proprietary nanolouver technology enables 85% transmission of the device's brightness . The Lenovo 16-inch Bright Screen Privacy Filter for ThinkBook 16 Gen4 from 3M also blocks 35% of harmful blue light.Lenovo 13.3-inch Bright Screen Privacy Filter for X13 Gen2 from 3M for ThinkBook 16 Gen4 from 3M offers world class privacy without substantial tradeoffs in brightness or security. On average, 25% brighter than the standard 3M black privacy filters. Proprietary nanolouver technology enables 85% transmission of the device's brightness . The Lenovo 16-inch Bright Screen Privacy Filter for ThinkBook 16 Gen4 from 3M also blocks 35% of harmful blue light.