Gas boilers, fires, central heating systems, cookers, water heaters, and even open fires which use oil, wood, coal or gas can produce carbon monoxide. It's potentially very dangerous so if you're using something like this in your home then it's important to monitor the CO levels to guarantee your safety. These Kidde monitors continuously check for the presence of deadly carbon monoxide in the home, providing a constant protection against its effects. Two notification LED's with test mode Along with the alarm, the red light illuminates when the alarm has detected CO in the atmosphere. Green confirms that DC power is present. Next to these lights you also have a test button to ensure everything is working as it should be. Suitable for caravans & boats Complies with the very latest EN50291.2010 standards, Parts 1 & 2. This means that this carbon monoxide alarm is perfectly suitable for boats as well as caravans. 85dB maximum volume To ensure you're alerted no matter what you're doing, this alarm will sound at 85dB. This is the equivalent of a loud lawn mower, but in your home. 10 year guarantee This alarm features an industry leading 10 year sensor life with an end of life warning to replace the unit after ten years protection. Supplied with ceiling & wall fixings This alarm can be placed on a tabletop or for a more discreet installation you can fit it on a wall or even the ceiling. You will be supplied with the fixings to be able to do this.