The medical device is a single syringe. The syringe is a transparent tube with a needle and handle attached. There is also a gray T-shaped handle separate from the syringe. To use the syringe you must first pour your liquid into the tube. Next make sure the T-shaped handle rests a little bit inside the tube. Next inject the syringe into whatever body part you’re using. Finally press down the T-shaped handle all the way down into the tube. Then take out the syringe and clean it thoroughly if you’re going to use it again. Make sure you handle the syringe with care as you do not want the liquid to leak out. The syringe is designed to use liquid medicine only.