AirGardian is a sensor that monitors the air / environment of loved ones and will remotely send an alert of any problems to your smart phone (or to a caregiver's). For example, it monitors dangerous gases such as natural gas, propane, or carbon monoxide. It can also be set to indicate that the loved one has gotten up in the morning and is moving about the room. Remote alerts allow caregivers to call and check that things are normal.