How you can use the Neutral Density Filters Lens (ND Filter) on iPhone and Smartphone

Want to know how our ND Filter Lens can use with a smartphone?

We have a video at Youtube:

Link:
https://youtu.be/WQNUIbZpllQ

ND2 / ND4 / ND8 / ND16 / ND32 Filter Lens (Neutral Density) for iPhone / Smartphone

https://dckina.com/index.php?main_page=product_info&cPath=4_349_335&products_id=2187


ND2 / ND4 / ND8 / ND16 / ND32 Filter Lens (Neutral Density) for Smartphone
https://dckina.com/index.php?main_page=product_info&cPath=6_246&products_id=2332