The ESD shielding bag can discharge static electricity because the surface of the shielding bag (internal, external or both) is electrically conductive and is in contact with another conductor (ESD grounding plate). To enable the shielding bag to discharge charge, it must be electrically conductive. It is connected to a conductor (usually requires grounding); the antistatic bag has antistatic properties but no shielding, electrical conduction or MVB characteristics. Therefore, anti-static measures means that the anti-static bag will not charge more than a certain voltage (usually 250V). The shielding bag should have foil or conductive film in all parts of the bag, depending on the device you are protecting. Packaging bags made of conductive, antistatic, and shielding materials also protect sensitive devices.