Shenzhen Bestman's Destroyer BD-310 destroys disposable syringe to reject cross infection completely. To melt the needle, insert the needle into the melting hole, and then press down the syringe gently when the needle touches the electrodes inside. While the needle is being melted, there will be spark and the needle indicator will be flashing for about three seconds, which is a normal phenomena. It has the overheat protection function to protect the machine and work normally while melting the needle. An ozone disinfection function and alarm function will indicate that the drawer is full of residue. The residual liquid in the needle will be vaporized instantly during melting. Interested? Please feel free to visit Shenzhen Bestman's official webpage for details.