The display receiver indicates the calling remote controller number. This unit is very essential to understand which patrolling party needs reinforcement. The remote once called continues to display the number till reset. An extra low range remote controller is also available, that helps in resetting. On bootup, the number counts. The turnaround time from the remote pressing the alarm to the display is around 2-3 seconds. The reaction time may sometimes vary depending on the terrain and environmental conditions. The display unit should mount at an elevated location. Increasing the height of the receiver display, improves the signal reception capacity. When more than 1 remote calls, the number rotates in round robin fashion.