Portable encoded information reading terminal configured to adjust transmit power level

A system and method of adjusting the transmission strength emitted by an integrated RFID reading device by an EIR terminal. The EIR terminal scans a signal of decodable indicia, locates the decodable indicia within the signal, decodes the decodable indicia into a decoded message, which is an identifier for said physical object. The EIR terminal then makes contact with the physical object and stores the location of this contact as a point of origin and then, moves through three dimensional and receives values from its motion sensing device representing the location of said EIR terminal in three dimensional space relative to the point of origin. Then, the EIR terminal determines the distance of the RFID reading device from the point of origin and adjusts the power level of said RFID reading device relative to this distance.