Detection of tetrahydrocannabinol (THC), 50 ng/l CLEARTEST drug test strips provide only preliminary analytical test results. Drug test results should be clinically evaluated and professionally assessed, especially if preliminary positive results are obtained. For professional in-vitro diagnostic use only. Visual analysis is that simple! Immerse the CLEARTEST test strip in the urine up to the mark for 10-15 seconds and evaluate the result after 5 minutes. Store at 2 - 30 °C. Package contents: 1 individually sealed test strip each Caution: This test may only be performed by trained personnel or under the supervision of such trained personnel. Please take this into account when purchasing and using the product.