The Kidde Essential Smoke & Carbon Monoxide Alarm Pack includes a smoke alarm and a carbon monoxide alarm. These alarms are perfect for detecting fire and carbon monoxide gases in all areas of your home, including kitchens. They are battery operated and easy to install, requiring no wiring. You can mount them to a wall or place them on a table top or shelf for convenience. The alarms come with a test button to check their functionality and power, and warning signals when the batteries need replacing. The carbon monoxide alarm also has an end of life signal that alerts you when it's time to replace the alarm after seven years of protection. This pack is ideal for use in holiday homes, rented accommodation, caravans, or boats. It includes a smoke alarm and a carbon monoxide alarm, making it easy to fit and use.