The smart handbag was constructed with a radio antenna and receiver which listensfor signals from radio frequency identification tags attached to important objects.
Rather than "pair" traditionally over WiFi or Bluetooth, the app fires up the microphone and listensfor unique inaudible tones that play underneath the sound effects.
In the movie, a researcher details how the average radio listener listensfor 18 minutes a day, but the average Stern fan listensfor an hour and twenty minutes.