There are many kinds of needleless syringes now: 1. The most classic is injex, which first entered the China market and was used for insulin injection. Because long-term injection is not easy to cause subcutaneous induration and the injection process is safe and painless, it is chosen by the majority of diabetic patients. However, due to the early entry into the China market, many counterfeit products have not gone through formal procedures, and the product quality, consumables supply and spring replacement service can't keep up, and they are sold at low prices, which brings troubles to the majority of insulin injection patients.
I hope my answer can help you!