3D Ultra-Clear Acrylic Lens: The Phone screen amplifier is equipped with a 3D acrylic lens that is clearer and brighter than the ordinary lens.Against blue radiation to protect your eyes, reduce visual fatigue caused by prolonged focus on small screens. Note: Please do not use in places with direct sunlight as light or objects reflected in bright places. To protect your eyes, we recommend watching it from 1-2m away.