Features: 1. The transparent left side of the model shows internal structure including bones, muscles, nerves and veins, facilitating to compare left side with right side and avoiding damaging the nerves and veins. 2. Correct intramuscular injection sites can be palpated. 3. Needle injections are correct and the correct position, the green light will shows. Plunge into too deep or incorrect injection site, there are red lights flashing and electronic alarm prompt. 4.Skin and muscle made by imported mixed Plastic Elastomer, ,model made by the stainless steel molde,whice is at high temperature, the feature of product is durable, real texture, Obvious needle marks.