Lenovo 13.3" 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 nanolouvre technology enables 85% transmission of the device's brightness. The Lenovo 16" Bright Screen Privacy Filter for ThinkBook 16 Gen4 from 3M also blocks 35% of harmful blue light.