Protect your home with the First Alert 2-in-1 Smoke & Carbon Monoxide Alarm. This reliable unit combines advanced smoke detection with CO monitoring in one sleek device. Equipped with a 10-year sealed lithium battery, it offers long-lasting protection without the hassle of battery changes. The simple installation and loud 85dB alarm provide peace of mind, while the tamper-proof design and end-of-life alert ensure your family stays safe year after year.