NovoPen 4 is a reusable insulin delivery device (insulin pen) designed for use with 3 mL insulin cartridges from Novo Nordisk, such as NovoRapid, Levemir, or Tresiba. It is intended for subcutaneous injection of insulin to manage blood glucose levels in individuals with diabetes. The pen features a user-friendly design, precise dose selection in 1-unit increments (up to 60 units per dose), and a built-in audible click system to confirm dose setting and injection. NovoPen 4 is known for its reliability, accurate dosing, and ease of use, making it suitable for both adults and children with diabetes.