B.way 1st Generation Active Magnetic Filters System
magnetic patented products, it was first created by B.way in china, installation quick & simple , HD glass, enhanced transmission coating, waterproof and antifouling, scratch-resistant, no color cast, exposure accurate, aluminum frame , NDs filter has more various stops choice ( From 3 stops to 20 stops )
Video
https://www.youtube.com/watch?v=dYmrt5Pzi0U