Here are the Check series product features:
 

• Sticker type makes it easy to carry and use.
  The size of a business card enables users to take advantage of it anytime, anywhere by attaching one or two on the back of wallet or smartphone before going to a party, club, or drinking party.
• It has a protective film, so it can be durable for a long time.
  Protective film is attached to the surface of the test paper, so it can be carried and stored for a long time by reducing the influence of humidity or foreign substances.
• It's easy to recognize GHB, Cocaine and Methamphetamine​
  Only half of the test paper is designed to respond to GHB, Cocaine and Methamphetamine, so users can easily distinguish between color changes.
• You can check the results immediately.
  The response appears in less than 10 seconds, allowing users to immediately check the results and take follow-up action on the spot.