It expands the scope of customers. It helps attract a vast number of potential customers from the delivery guy to the customer, to people passing by the mailing boxes, who would otherwise not be attracted if the merchandise is delivered in plain boxes. It is of extremely low self-discharge rate and can be left unused for a longer time. This product can give the wearer a variety of feelings, such as fashion, beauty and radiation protection. It is of extremely low self-discharge rate and can be left unused for a longer time.