SuperGuardZ Blue Light Blocking Screen Protector Hanging Panel For iMac 27" SuperGuardZ® tempered glass anti blue light screen protector is especially designed to filter blue light to eliminate its negative impact on your health. Exposure to electronic devices (e.g., smartphones and tablets) can cause eye strain, fatigue, pain, and even severe headaches as their screens release blue light. Moreover, it has been known that blue light exposure can also lower melatonin levels associated with deep sleep.  Features:           Reduce eye-fatigue and eye-strain: Filter harmful blue light and prevent it from impairing vision and ability to concentrate (especially for children) Health Protection: Promotes healthy melatonin levels for deep sleep High Quality Optical-Grade Acrylic: Amazing material to protect your devices from scratches and high-impact drops                 Ultra Clear Screen Protector: High transparency for HD clarity           UV Protection: Reduces eye strain caused by your screen Hanging Type Panel for Easy Installation: Simply remove the sticker and hang on the monitor screen. Totally bubble free and perfect fit Compatibility:           iMac 27" Package Content:           Premium Blue Light Blocking Screen Protector SuperGuardZ® Lifetime Warranty:           SuperGuardZ® fully stands behind our products with lifetime warrantys           SuperGuardZ® offers you a quick, no-hassle REPLACEMENT OR REFUND            SuperGuardZ® products are warranted against manufacturing defects (e.g., bubbles)