Let’s face it—most people don’t need a cool smoke alarm. If you happen to be one of those individuals who do, the Silhouette is the product for you. The unit has a svelte appearance that will blend into the background, but its design is hip enough that you’d be proud to show it off. Though the detector is hard-wired into your home’s electric system, it does have a back-up lithium battery that will last the life of the alarm. www.kidde.com.