A mechanism whereby a set of microprocessors may be set to a common mode in which the microprocessors utilize one or more features that are common to all microprocessors. Comparing to the present art, the electrical connector of this invention prevents the two ends of the one-body conductive terminal from compression by PCB and chip module at the same time that makes the conductive terminal easily yield and deformed, making the elasticity of the terminal to become poorer and present contact problem, in order to guarantee good electrical conductivity. A network of the multiple sensing nodes obtains such a spectrum estimate without requiring high-speed analog-to-digital converter to accommodate the large band-width of interest. Loading effects on the undercut of the recess etch are greatly reduced, resulting in reduced transistor performance variation. The first actuator can be at least partially disposed within the second actuator. A light emitting region of the first unit and a light emitting region of the second unit are arranged to be separated from each other.