Nice outlook, reasonable structure and no bad side-effect to operators. The safe prevention to the second-hand infection and the perfect solution to the used needle of injector. The waste after being treated can be collected as ordinary rubbish without any pollution to the environment, conforming with the national collected as ordinary rubbish without any pollution to the environment, conforming with the national protection. Small size and design for the convenient storage and portability. Work under low Constant voltage, simple operation and safe use.