WiMBedCall is the product designed for anyone having the need of be promprtly warned, via phone call and, if requested, via acoustic/optical alerter, if an assisted person leave the bed or if she does not return to bed within a specified time period. The system has the function of signaling the critic event to allow for a quick intervention, minimizing the fall risks. There is a base version, the WiMBedSimple, which signals the leave and non-return events using acoustic signal only.