1. A monitoring device, the device comprising; an image sensor unit; a processor unit coupled to the image sensor; a memory unit coupled to the image sensor unit and the processor unit; wherein the image sensor unit, the processor unit and the memory unit are fabricated in a stack configuration; a wireless unit coupled to the processor unit; and a power unit coupled to the image sensor unit, the processor unit, the memory unit and the wireless unit, wherein the power unit provides power to the other units.