It is a nylon rope by iPhone 11 Pro HD Macro Lens.
It is custom for iPhone 11s!
https://dckina.com/index.php?main_page=product_info&cPath=4_358&products_id=2409
The use is super easy, just get the lens close to the object, slightly adjust the focus by leaning a little bit closer or away from the object until it got the clearest image, then just shot and take as many pictures as you can.
If you are a pro, there is no problems you can take stunning pictures.
If you are just a newbie, the macro lens is still a good start for you, why? Just take as many pictures you the insect / object is allowed, then choose the best one to show to your audience. 1 out of 10 or 20 or at most 30 will surprise you as we always did.
Check out the video below:
Some videos taken by this lens with different types of mounts are available at YouTube.
To learn more, click the link above.
SKU for the iPhone 11 Kit: DCK006118