**Product Specifications:**
**Brand:** Laofudru
**Certifications:** Authority testing, quality assurance
**Lens Properties:** Light transmittance ratio, polarization efficiency, UV protection (UV cutoff wavelength) meet national standards
**Inspection Results:** Summary page N: 2023W019, 3 pages total, 2nd page
**Standard Terms:** Inspection items, standard requirements, test frames, single item discrimination
**Sun Glasses:** Including frame and lenses, compliant with GB 39552.1
**Structure:** Skin contact parts should be smooth, no protrusions that could harm the body
**Lens Material:** Smooth surface, no harmful visual defects within the identification area
**Light Transmittance:** Right: 96%, Left: 92%, compliant with GB 39552.1
**UV Protection:** GV (315nm~380nm): 0.0 (0.01t), TGVA (280nm~315nm): 0.00 (00), compliant with GB 39552.1
**Uniformity:** Lens (Δ): ≤15%, compliant with GB 39552.1
**Color Vision:** Red: 0.80, Yellow: ≥0.60, Green: ≥0.60
**Scattered Light:** Right: 0.4, Left: 0.5, compliant with GB 39552.1
**Deviation:** Right: -18, Left: +2.9, compliant with GB 39552.1
**Polarization Efficiency:** For polarized lenses, efficiency should be greater than 78%
**UV Cutoff Wavelength:** ≤2.0, compliant with national testing standards
**Model:** LF-202
**Lens:** High-definition polarized
**Gender:** Unisex
**Function:** Sun protection, polarization
**Material:** TAC + metal alloy
**Weight:** 9g (adult size), 7g (children size)
**Dimensions (Adult):** Total width: 140mm, Lens width: 60mm, Lens height: 55mm, Bridge distance: 14mm
**Dimensions (Children):** Total width: 130mm, Lens width: 55mm, Lens height: 47mm, Bridge distance: 13mm
**Frame Shape:** Suitable for most face shapes, including Asian facial features
**Color Options:** Cool black-gray, Stylish blue (A2)
**Installation:** Easy to assemble with various frame styles
**Features:** Lightweight, UV protection, suitable for outdoor activities
**Usage:** Can be worn over prescription glasses, simple one-hand operation
**Benefits:** Protects eyes from UV rays, reduces glare, maintains true colors
