Abstract: An object of the present invention is to provide a system which can transmit part or all of the product information corresponding to a product purchased by a user, to another user terminal. [Solution to Problem] A system including at least one computer apparatus, the system comprising: a sending information generator that generates, by operation on a user terminal, sending information for transmitting part or all of product information corresponding to a product purchased by a user to another user terminal operated by another user; and a transmitter that transmits part or all of the product information to the other user terminal when the sending information is selected or input on the other user terminal.

Abstract: An object of the present invention is to provide a system which can transmit part or all of the product information corresponding to a product purchased by a user, to another user terminal. A system including at least one computer apparatus, the system comprising: a sending information generator that generates, by operation on a user terminal, sending information for transmitting part or all of product information corresponding to a product purchased by a user to another user terminal operated by another user; and a transmitter that transmits part or all of the product information to the other user terminal when the sending information is selected or input on the other user terminal.

Abstract: A method for printing a letter, character or a figure on an inner ear type headphone, which is a molded body of a thermoplastic synthetic resin, by irradiating the surface with a laser light, and a headphone housing on which the letter etc. has been printed by the above method. The printing is performed by irradiating the surface of the synthetic resin molded body with a laser light for expanding any moisture or air contained in the molded body for foaming the surface. Printing is achieved in the form of foamed regions of the synthetic resin and hence is clear and superior in abrasion resistance and durability.

Abstract: A method for printing a letter, character or a figure on an inner ear type headphone, which is a molded body of a thermoplastic synthetic resin, by irradiating the surface with a laser light, and a headphone housing on which the letter etc. has been printed by the above method. The printing is performed by irradiating the surface of the synthetic resin molded body with a laser light for expanding any moisture or air contained in the molded body for foaming the surface. Printing is achieved in the form of foamed regions of the synthetic resin and hence is clear and superior in abrasion resistance and durability.

Abstract: An electro-acoustic transducer includes a housing enclosing an electro-acoustic transducer device and having an opening by which the diaphragm side of the transducer device is exposed to the outside, and a ring provided to the outer surface of the perimeter of the opening. The outer perimeter of the ring is adapted to be softer and more pliable than the housing.