Over 99% Accurate – More than 99% accurate in detecting Fentanyl (WFTY) with the 20 ng/ml cut-off level. Easy to Use Design & Instant Results - Each test is sealed in an individual pouch for easy carry and sanitary. It is easy to use and administer. Dip the test in urine for 10 seconds and read the result in 5 minutes. 2 lines appear if clean; 1 control line only appears if not clean. Save time and money with our at-home Fentanyl (WFTY) urine test by avoiding the typical high cost and long wait times at a standard laboratory. Perfect For pre-employment, school testing, rehab clinics, workplace testing, law enforcement DUI or personal home testing.