The fall sensor contains advanced electronics that record & process motion in multiple directions & speeds. When worn on the waist via the integral belt clip or a body belt the sensor can detect a change in angle, orientation & impact that can differentiate a fall from normal daily activity. Activation of a fall alarm occurs automatically when the wearer falls. When the fall sensor is connected to a carephone an alarm is transmitted automatically. A call can also be also transmitted via the emergency call button. Please note this device is compatible with Care Tech systems only. Important note: This sensor is only compatible with Care Tech Carephones.