---Areta Nicotine Test Strips are a highly accurate and reliable method of the presence of cotinine, a metabolite of nicotinein urine samples. The strips are highly accurate, with a detection limit of 200 ng/mL. ---Areta cotinine test strips are designed for use in a variety of settings, including workplace testing, smoking cessation programs and also suitable for those parents using for teen care test. ---Areta cotinine test strip is very easy to use with 3 simple steps. Just collect a small urine sample a, dip the absorbent end into urine for 10 secondes. Then lay the strip flat and wait for a few minutes. A positive result may preliminary indicates the presence of cotinine in the urine, while a negative result indicates that cotinine was not detected. ---Instant & Accurate Results: The results will appear in 5 minutes.