PRODUCT GRADING (Grade B) - Good Condition > Very light scratches and light signs of use > Refurbished to the highest standards. Retail Box WHAT IS IN THE BOX Nusign 24 inch Easy Hang Blue Light Blocking Screen Protector Panel for Desktop Computer Monitor PRODUCT DESCRIPTION The filter can cut most of the harmful blue light.Reduce eyestrain and headache.Give you a better sleeping.Anti-Blue Light blocking between 380nm~495nm for wide range HEV protection. REDUCE EYESTRAIN Enjoy your digital time, NO worry about eye fatigue, blurred vision and headache.Better sleep for you, blue blocker for your eyes and guardian for your health. SLEEP BETTER Better sleep for you, blue blocker for your eyes and guardian for your health.Easy Installation and removal - Hang it when use the filter PRODUCT INFORMATION Compatible devices - Desktop Material - Polycarbonate Brand - Nusign Screen size - 24 Inches Package type - Standard Packaging