LOUD & ACCURATE ALARM: From just 50ppm of CO in the air, the Kidde 5CO will emit a loud 85db piercing alarm alerting occupants to the presence of carbon monoxide. FREE STANDING OR WALL MOUNTED: For ease of installation, the Kidde 5CO model can be placed free standing on any surface, or can be wall mounted with the included screws and wall plugs.
eBay