The Base Station can pulse red for two different reasons. Depending on the length of the pulse or the timing between it, it can mean different things.

If you are seeing a slow pulse, with 8 to 10 seconds between every red pulse, it indicates that there is a minor system error such as radio interference. You can check the Keypad for more details.

If you are seeing a continuous pulse for 1-2 minutes, this indicates that there was a recent alarm. After 1-2 minutes the Base Station will turn to a solid red light to alert you to the recent alarm. You can check the Keypad or the SimpliSafe App for more details. To clear the recent alarm, simply disarm your system from the Keypad or SimpliSafe App.