The present invention includes a housing for carrying the components or circuits. The housing include a first part that is located in the slot when the present invention is inserted into the computer. The second part of the housing extends outside the slot of the computer. A wireless transmission module is set in the second part for transmitting the signal. A SIM is set also in the second part of the housing. A hot swapping protector is located in the first part of the housing and electrically coupled to the SIM for protection. A card reader is connected to the hot swapping protector and a power control module is connected to the card reader, the hot swapping protector for providing the power.