HumaPen Luxura HD Device is an Insulin Delivery Device is designed for ease of use. With HumaPen Luxura HD Device we can inject from 0.5 (½) to 30 units of Lilly insulin from a 3 mL Cartridge (100 IU/mL). You can dial your dose one half (½) unit at a time. If you dial too many units, you can correct the dose without wasting any insulin.Direction of Use:1.Pull off cap 2.Insert catridge3.Push screw back4.Attach catridge holder 5.Inspect Insulin 6.Roll the pen gently 10 times,and invert the pen 10 times.The insulin sholud look evenly mixed.Use under medical supervision.