10 of 12 people found the following review helpful
Easy to Install,
This review is from: First Alert CO615 Dual Power Carbon Monoxide Plug-In Alarm with Battery Backup and Digital Display (Tools & Home Improvement)
All the local stores in Colorado were out of stock with waiting lists for CO detectors due to media coverage of several deaths in the state. We got these in less than a week, and they were very easy to just plug into any outlet. They came with the back up batteries, so I didn't even need to supply my own. Could not have been easier, and have the best of both worlds...an A/C powered unit with back up battery that I could install myself without mounting hardware or an electrician.