The Opioid Overdose Prevention Kit includes a hard-shell carry case, five WHPM fentanyl test strips, mixing container, 10mg spoon and instructions. Add Naloxone nasal spray to complete a full overdose prevention kit. Naloxone nasal spray not included. WHPM fentanyl test strips are designed to detect fentanyl in powders, pills, liquids, and urine. Made in the USA by WHPM with over a decade of experience in research and development of high-quality rapid diagnostic tests. The test strips can detect as little as 10 (ng/ml) of fentanyl while the industry standard is 200 (ng/ml). The test strips have a 99% accuracy rate detecting fentanyl in a reproducibility study. Each production batch is tested in the lab for verification. The kit includes simple instructions - Add substances with the 10mg spoon to the mixing container filled with water and stir. Dip the test strip below the max water line for 15 seconds. Wait 5 minutes for the test results to appear. Results will show 1 or 2 lines. 1 is hot (Positive) - 2 is not (Negative). The durable hard-shell case is custom sized to securely hold fentanyl test strips and 1-2 doses of Naloxone nasal spray while easily fitting in a purse or backpack pocket. Includes optional carabiner for easy attachment. Each case is clearly labeled “Overdose Prevention Kit” on the case for fast medical response. Case Dimensions: 3.5 in (L) x 6 in (W) x 2 in (H). DISCLAIMER - Technical and/or procedural errors using the test, as well as other substances and unknown factors or variables may interfere with results. A positive test result indicates the presence of fentanyl only, and does not indicate quantity. A negative test result does not indicate that no fentanyl exists in the substance being tested, but only that the presence may be below the test's detection level. A positive or negative test does not indicate that the substance being tested is safe to use.