I would purchase an EC/ppm meter if I could afford, but some are so darn expensive! I'm a college student living on a college budget! Looks like another week of Ramen noodles lol!

What do you think of this product?

Sunleaves TDS Essential Pen for $39.95

The Sunleaves TDS Essential Digital Pen measures total dissolved solids from 0 to 9,999 parts per million with a resolution of one part per million and includes a data hold feature for temporary TDS reading storage.
Has anyone used this product? I am unsure of the quality of Sunleaves products..