Abstract: A wrist worn device, comprising: a single piece flexible printed circuit board (PCB), the single piece flexible PCB having: a central portion fabricated with a central conducting area configured to connect electronically to an electronic source, a processing unit and a cellular communication circuit; a band portion fabricated with conductive materials for forming an integrated antenna electrically connected to the cellular communication circuit via the central conducting area; and a second band portion; a Global Positioning System (GPS) module electrically connected to the processing unit and to the electronic source via the central conducting area; a first band cover mounted to wrap the first band portion; a second band cover mounted to wrap the second band portion; and a central portion cover having a receptacle area for housing the electronic source, the processing unit and the cellular communication circuit.