Keep your home safe with the Knox Safety Battery Operated Carbon Monoxide Detector. This device features voice alerts and a display to ensure you and your family are alerted to any potential dangers. The detector runs on batteries, making it easy to install and use. With a 10-year manufacturer warranty, you can be confident in the quality of this carbon monoxide detector. It is perfect for those who want to keep their home security up-to-date. This unit quantity of 1 is all you need to protect your home and family.