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This works as it should. I've only used it to test a single substance, but it provided accurate results within the suggested timeframe. The instructions could be a bit clearer, but once you use it they make a bit more sense. Worth perhaps mentioning also that the swab itself is bigger than I expected, and needs to be left in your mouth for a few minutes. It is not a swab, but a kit for gathering saliva then to be tested.
Verified purchase: Yes | Condition: New
A good product that is quick and easy to use. Fairly fool proof to use and good quick results every time.
Verified purchase: Yes | Condition: New
A good product Would recommend
Verified purchase: Yes | Condition: New
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