【Photochromic Lenses】Photochromic lenses change color depending on the intensity of the sun's ultraviolet rays. The UV 400 protective coating blocks 99% of harmful UVA and UVB rays. They provide sun protection and glare reduction, which can reduce eye strain and improve the appearance of wrinkles and spots around the eyes. The effective connection distance is up to 30 meters. Features include music playback, calls, and smartphone voice playback, making various operations more comfortable. The built-in microphone allows for clear voice calls, and the speaker automatically adjusts the volume to match the surrounding sounds, protecting conversation privacy. 【Blue Light Cut】High-quality blue light blocking lenses are used, with high visible light transmittance and low chromatic aberration. They effectively cut harmful light to the eyes when using computers, handheld game consoles, smartphones, and tablets. They effectively relieve eye fatigue, protect eyesight, and improve sleep quality. 【Wide Range of Uses】These glasses can be used for gaming, smartphones, computers, and TVs, not only indoors, but also for UV protection outdoors, such as driving, golf, fishing, running, cycling, mountain climbing, and baseball, thanks to their photochromic and polarized functions. 【Large Capacity Battery】Built-in 60mAh + 60mAh large capacity battery, with a charging time of about 2 hours, continuous music playback and calls for up to 4 hours, and a standby time of up to 7 days. 【IPX5 Waterproof Glasses】With IPX5 waterproof performance, you can enjoy sports, music, and phone calls without being affected by sweat or rain.