A power amplifier protection circuit that includes protection circuitry to variably shunt an input radio frequency signal to AC ground, turn off bias to an output transistor of a power amplifier, and turn off the output transistor. Each of the communication channels may be utilized to exchange communications about different aspects of acquiring and redeeming deals. The miniature fiber radio transceiver may also include an energy source in the form of a piezoelectric fiber composite transducer having a plurality of elongated elastic piezoelectric fibers embedded in a composite material. Each vulnerable interconnect is then relocated to a different location until the performance requirements are met. As a result, the exterior rearview mirror is economical to manufacture and also to assemble.