Monitored smoke detectors have advantages over unmonitored detectors. Monitored detectors can send alerts to your phone if smoke is detected, allowing you to know which specific detector was triggered. This is useful if you are away from home. However, unmonitored detectors are cheaper, with a cost savings of up to $11 per detector. In addition to smoke detectors, the document recommends installing carbon monoxide detectors, which can detect harmful levels of carbon monoxide and send alerts, protecting homeowners even if the security system is disarmed. Properly locating both smoke and carbon monoxide detectors can help save lives in the event of a fire or carbon monoxide leak.