Knowles and the rest of the band members had a Sennheiser EK 300 IEM G2 monitoring receiver.

The RX741 Panoramic Microwave Surveillance and Monitoring Receiver is an upgraded version of the well established RX740.

The best known copies are probably two German models widely employed as monitoring receivers by the German services, the KST made by Korting Radio and the R4 made by Siemens.

Already missing quarterback E.J. Manuel (knee) and running back C.J. Spiller (ankle), the Bills now are monitoring receivers Stevie Johnson and Marquise Goodwin after injuries in Sunday's game.