A reaction wheel system is provided that includes at least two rotors. When an end of the handset is on-hook with the base, the end of the handset reflects the light emitted from the light transmitter and penetrating through the light penetrating element back to the light penetrating element. The tool may include a storing module that stores the information and a displaying module that causes the information to be displayed on a display of the tool. Further still, transmitting a ready signal indicating the recipient PTX device is ready to output PTX message segments. In this way, the tomosynthesis techniques rely on counting photons rather than measuring their energy to create synthesized images.