The Base Station is designed to notify you using a few different colors and sounds.
Looking for readings from your baby.
Sock out of range from Base Station, depleted battery or signal blocked.
Sock has fallen off or is improperly placed.
Heart rate or oxygen level are outside specified limits.
The Sock was placed on a Base Station it is not paired to.
Sock is plugged in and charging.
Sock is not paired to Base Station.