Kensington Presenter Expert™ Wireless with Green Laser - Black (K75774WW) External Hard Drives & SSDs and they filter out harmful

and they filter out harmful Blue light by up to 30 percent

Designed to ensure maximum space efficiency

this handy cable features a male 3-prong plug which splits to four female 3-prong shrouds

Switch back and forth from landscape to portrait orientation at any time

HDMI technology uses a much more compact and user-friendly connector than the existing DVI connector

Kensington Presenter Expert™ Wireless with Green Laser - Black (K75774WW) External Hard Drives & SSDs and they filter out harmfulPresent like a pro with the Presenter Expert Wireless with Green Laser Black Intuitive four button layout lets you easily go forward and back on your PowerPoint or Keynote slides while the other two buttons let you hide your screen and use the green laser pointer (10 times brighter than a standard red laser)