Brand Name: VANLOOK Origin: Mainland China Blue Light Blocking Rate: 20%-90% Element type: Basic Classic High-concerned chemical: none Gender: Men Frame Material: Stainless Steel Style type: Rectangle Lenses Material: Polycarbonate Lens Height: 31 mm (1.22 in) Model Number: Blue Light Blocking Glasses for Computer Lens Width: 55 mm (2.17 in) Certification: NONE Item Name: Men's Myopia Computer Glasses Frame Color: Black Lens Color: Clear Lenses with Slightly Blue Coating Prescription: -1.0 -1.25 -1.5 -1.75 -2.00 -2.25 -2.50 -3.00 -3.25 -3.50 -3.75 -4.00 Glasses Frame Style: Half Rimless/ Half-frame/ Full Frame Optical Attribute: Anti Eyestrains,Anti Blue-ray,Antiglare,Antireflective, Antiradiation Function 1: 1980s Fashion/ Business Elite Style Function 2: Short Sighted, Eye-protector, For Long Time Computer Work Function 3: Gaming Glasses Packing List: Computer Glasses x 1pc Gift Packs: Glasses Bag x 1pc, Lens Cloth x 1pc,Screwdriver x 1pc,Brand Card x 1pc