https://www.livescience.com/7223-smart-sunglasses-change-color-demand.html
Smart Sunglasses Change Color on Demand | Live Science
Mar 27, 2007 - Smart new sunglasses could instantly change into virtually any color on demand with just a turn of a tiny electronic knob on their frames.
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https://www.szmorrison.com/Products-Details?product_id=205&brd=1
Sport Smart Sunglasses with Bluetooth Audio and UV400 Protection
Smart Bluetooth sunglasses with UV400 protection, dual batteries, music and call support, BLE 5.4, ideal for cycling, running and daily wear.
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