WarmlyYours ClearlyYou Electric Mirror Defogger prevents moisture from forming on your mirror's surface during bathing or showering. There is no waiting in the morning to shave or apply make-up. Your mirror is steam free and streak free whenever you are ready to complete your routine. Designed to install easily by any do-it- yourselfer, simply position the wafer thin self-adhesive backing behind any wall hung mirror, remove the protective sheet and press firmly into place. The electrical power leads simply connect to the vanity lights above the mirror. The defogger is automatically activated when you turn on the light. Installs in minutes. Suitable for dry location only.