A module provided in a predetermined space of an operation panel of a transaction terminal device to input and output digital information, includes: a wireless unit, a scanner unit, and a housing. The housing has a first front surface member and a second front surface member, a lower side of the first front surface member projects toward an operator with respect to an upper side of the first front surface member, an upper side of the second front surface member projects toward the operator with respect to a lower side of the second front surface member, an antenna of the wireless unit is provided on a back side of the first front surface member, a lower side of the antenna projects toward the operator with respect to an upper side of the antenna, and the scanner unit reads a code through an opening of the second front surface member.