US Patent 7884721 Devices for identifying and tracking wireless microphones

The invention is a system for remotely identifying sound amplification devices and other electronic devices. This system introduces the ability for sound technicians to remotely identify which electronic devices have entered the stage or performance area. The system includes an identification tags, visual markers, sensors, receiver, and monitor. Remote identification can be achieved through RFID (radio frequency identification) or Line of sight (like infrared). Using directional sensors or sensors of adjustable sensitivity.