Product Name: WICUE 0.1-Second Instant Dimming Sunglasses Materials: Liquid Crystal Lens - Polycarbonate, TAC Lens Frame: Plastic Temple: Plastic Hinge: Metal Colors: Black/Tortoiseshell Weight: Approximately 30g Product Specifications: Light Sensing Method: Light Sensor Power Source: Solar Panel Dimming Speed: Within 0.1 seconds Lens Color: Gray Brown Color Shift: None UV Cut: 99% or higher Polarization Function: Yes Visible Light Transmittance: Strong Sunlight: Approximately 20%, Facing the Sun: Approximately 7%, Facing Downward: Approximately 15%, Shade: Approximately 37% Product Description: Instantly change lens density in 0.1 seconds with this sunglasses, perfect for when the sunlight is too bright! Blocks 99% of ultraviolet rays! The polarization function prevents glare from surfaces like roads, water, and the windshields of oncoming cars. Thanks to the built-in solar panel, there is no need for charging. With its classic 'Wellington' design, it can be used in various settings. Charging is completely unnecessary, thanks to the solar panel!