Keep your home safe and secure with the Nest Protect Wired Smart Smoke Alarm and Carbon Monoxide Detector. It helps to alert for fast-burning fires, smoldering fires and carbon monoxide. It also speaks up when there's a problem, can be hushed from your phone and will even message your phone in case you're not home. The Nest Protect smoke alarm uses a split-spectrum sensor and includes a motion light. This item is also compatible with the Nest app. This hardwired version is suitable for homes with existing hardwired smoke or CO detectors.