A hand-held power tool having a housing and a removably attachable portion. The traffic through which the communication is established between the radio base station and the radio communication terminal includes first traffic whose bandwidth is guaranteed and second traffic whose bandwidth is not guaranteed. The system further includes a hand-held computer that embeds control circuitry including at least one controller for the at least one internal peripheral or at least one external peripheral, and an interface for coupling the hand-held computer to the expansion device in a removable manner.