**Product Specifications:**
**Brand:** Four Thousand Kilometers ()
**Model:** SWF1031
**Lens Function:** Blue Light Blocking
**Frame Material:** Metal
**Color Style:** Silver Frame
**Suitable Face Shapes:** Round, Oval, Square, Heart, Diamond
**Frame Weight:** Approximately 14.8g
**Frame Dimensions:** 51mm (Lens Width), 32mm (Lens Height), 19mm (Bridge Width), 145mm (Temple Length), 140mm (Frame Width)
**Features:**
Blocks over 80% of harmful blue light
Easy to clean from oil stains
UV protection
Lightweight and comfortable
High light transmittance of over 90%
Anti-glare and anti-fatigue
True color perception with low color distortion
Durable and long-lasting
**Institutional Testing and Certification:**
Report Number: HWJC20230069
Page: 3 of 4
Single item inspection
Complies with standards for harmful blue light protection
**Details Show:**
Metal frame with minimalist design
Three-point stable design for comfortable fit
Adjustable nose pads for a personalized fit
Comfortable temple arms for extended wear
**Product Display:**
Silver frame design
**What is Blue Light?:**
Blue light with wavelengths between 385nm-445nm
High-energy blue-violet light that can cause eye strain and discomfort
VG blue light blocking technology for reduced eye fatigue and screen glare
**Product Information:**
Suitable for various face shapes including round, oval, square, heart, and diamond
Provides a comfortable and stylish solution for daily screen use
