A radio communication adapter box (1,11) for data exchange computer link between a first master-type computer equipment and at least one second peripheral-type computer equipment, the box being connected to at least one second computer equipment. The adapter includes a radio transmission/reception module (2) according to the Bluetooth.RTM. protocol with a Bluetooth.RTM. protocol stack, at least one interface controller with wire link connector towards at least one second equipment and a stand-alone electro-chemical power supply source (5), the power supply source (5) feeding at least one second equipment. The invention also relates to an adapter as well as a communication system for computer data exchange are also disclosed.