3M 19 21 Privacy screen

3M Privacy Computer Filter PF400XXL 19 21'', flat frame, keeps confidential information private with 3M's patented microlouver technology; on screen data is visible only to persons directly in front of the monitor, passersby see a blank, dark screen. It offers privacy without blurring or distorting screen images. It reduces glare up to 95%; prevents static and dust build up when properly grounded; blocks up to 99.9% of ELFVLF E field radiation when properly grounded; utilizes the assembly free flat frame design; outside dimensions 14.33 x 17.33 x 0.40 inches 364 x 440 x 10.2 mm; viewing area diagonal is 20.6 inches 523 mm; standard tint glass; cleans easily with a soft, lint free cloth and glass cleaner.