the computer 4 supplies the power to the peripheral unit 12 through the peripheral power supply connector 42 fig9 b illustrates the data input output connector 38 the power input connector 40 and a peripheral power output connector 44 which are the cable input connectors and are integrated the peripheral power output connector 44 is arranged at a sidewall of the computer 4 and is connected to the peripheral power supply connector 42 the data transmission connector 34 the power connector 36 and the peripheral power supply connector 42 are integrated so as to make the cable the peripheral unit the power adapter and the computer compact and lightweight similarly the data input output connector 38 the power input connector 40 and the peripheral power output connector 44 are integrated so as to make the cable and the computer compact and lightweight fig7 b illustrates the data transmission connector 34 and the power connector 36 which are configured to be detached from each other it is a difference from the connectors of fig7 a further fig8 b illustrates the data transmission connector 34 the power connector 36 and the peripheral power supply connector 42 which are configured to be detached from each other it is a difference from the connectors of fig8 a advantages to form the data transmission connector 34 and the power connector 36 detachable as shown in fig7 b will be described if the computer 4 needs a function of a power adapter only the data transmission connector 34 may be detached so as to make a connection mechanism between the cable and the computer 4 compact and lightweight by removing the data.