Smart Bluetooth Sunglasses with Electrochromic Lenses, Multi-Level Tint Contr…
ELECTROCHROMIC LENSES & ONE-TOUCH ADJUSTABLE TINT: Instantly change your lens tint from 37% to 7% Visual Light Transmittance in less than 0.1 seconds-1,800x faster than photochromic lenses. Tired of switching between multiple pairs of glasses for different lighting conditions?.