BLOCK BLUELIGHT&+2.0 STRENGTH: The use of anti-blue light lens can effectively filter out harmful blue light in mobile phones/computers/TVs, reduce eye fatigue and tension, and relieve headaches; even after long-term use of PC, the eyes still feel relaxed. MINI SIZE: Only 13g. Light and resistant lens, comfortable to wear, protective soft PU case designed with zipper. The case fits easily into the smallest of places allowing you to keep a spare at hand. DURABLE MATERIAL: Featuring stainless steel telescopic. Three-section shrink frame design, through many stretching test experiments, long - term use. Comfortable nasal wing, never tired of wearing our blue light blocking glasses with Magnification Strength: 2.0 x DESIGNED FOR POCKET: For people on-the-go. Finely engineered, premium rimless glasses that unfold and foldaway, with ease. The beautifully engineered glasses unfold to full size reading glasses and fold away into a neat, fold up into a case so small, youll forget they're in your pocket or bag, that is, until you need them