CoStar 9RV CO detector September 11, 2009, 05:02:50 pm Yahoo Message Number: 105790Quantum is the CoStar manufacturer; its website is: http://www.qginc.com/products.htmlThe CoStar (model 9RV is the model in the LD) is available from the link on this page, and from additional sources; here are two: http://www.makariosrv.com/products/CO-Detector-Model-9RV.htmlhttp://www.safehomeproducts.com/shp2/sm/costar-carbon-monoxide-alarms.aspx#9rv(Safe Home Products is also the vendor if one buys through Amazon.)Joan