The UTest-O-Meter 5 Level THC Drug Test detects THC at 15-50-100-200-300ng/ml. This test features the ultra sensitive THC 15 ng/mL level; comparable to laboratory GCMS testing. The higher the ng/mL level (ie 100-200-300 ng/mL) that shows up positive, the longer it will take to get clean. This drug test is consistent with GCMS confirmation levels. Detects THC at the industry standard of 50ng/mL as well as higher and lower levels, giving you 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.