The UTest Single Panel THC Drug Screen detects THC at 50ng/ml, the standard level of detection for most drug tests on the market. This drug test is consistent with GCMS confirmation levels. Detects THC at the industry standard of 50 ng/mL, giving the user the assurance to pass a standardized test. One step, easy to use, self testing device. The manufacturer offers customer service, clear instructions & test interpretations on the packaging. Made in the USA.