I have installed a new sensor but it is not auto pairing to my siren. What's going on?

Your siren can only connect up to 10 sensors. If you would like to add more you can either buy a second siren or have the sensor act independent of the siren. This means your sensor will act just like any other, except you will not hear the alarm sound coming from your siren when it is tripped, and any bypassing of that sensor will happen in the app. When you Arm or Disarm from your siren, all sensors including independent sensors will react.