5.0 out of 5 stars It did its job!

P. · February 13, 2025

(function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } Accurate. I tested it out with water and a very very small amount of substance. There were no false positives or errors triggered. I wish it was able to determine the amount of substance present, but this did what it was supposed to do... detect even in small amounts.

5.0 out of 5 stars Does what it says

D. · February 22, 2025

Reliable and fast

5.0 out of 5 stars Accurate test

S. · August 26, 2024

These tests are easy to use and accurate. The results are easy to read. They are very convenient to have around. I will continue to purchase.

4.0 out of 5 stars It works

R. · July 15, 2024

Like the fact I always got an accurate reading!!!

5.0 out of 5 stars The best one I have used. Breaks it down well!

R.A. · November 8, 2022

Prime Screen shows a better breakdown of what the client fails in. It reduces arguments and shows a clearer reading.

5.0 out of 5 stars As described. Thank you!

A.M. · November 5, 2022

Use these in my addiction facility. Work rather well. Good supply for the price.

5.0 out of 5 stars Works as advertised

K.C. · October 5, 2022

Everything worked accurately and quickly

1.0 out of 5 stars Not accurate!

R.W. · April 30, 2025

These are terribly inaccurate. Go to your PCP to get an accurate test. I feel sorry for all of the kids whose parents use these.