A refrigeration system configured for use with a trailer including a container having a roof, a first sidewall, and a second sidewall. Each compressor rotor airfoil assembly comprises an annular rotor portion, a spacer portion extending axially therefrom and a plurality of airfoils extending radially therefrom. The module includes a wireless communication module to transmit or receive a control single of the at least one light emitting device. The transmitter may generate a plurality of TBs and assign each TB to a H-ARQ process. Illumination light L2 introduced into the guide plate escapes gradually from the back face and the illumination output face on the way of propagation. A digital IF demodulator is disposed on the substrate and coupled to the VGA for low voltage applications, for converting the IF signal to a demodulated baseband signal.