we are different from others.our stethoscope necklace 'Material is copper,and before some buyer said that it is easy to fall off,but we have fixed the heart on the stethoscope,and we have changed the package,it is so beautiful and fantastic,please see the package picture,and about the bracelet,the bracelet is made by ourselves,and the quaility we can control,and when you get the item found it was broken,please tell usUse of the product: Do not contact with chemicals wipe with a soft cloth daily Do not wear in a bath Attention to collision and cut Do not wear in a lot of sweating Do not wear it when you sleep