First Alert Smoke Alarm Slim Profile Design Model #P1210 Keep your home safe with this First Alert Smoke Alarm with a Slim Profile Design. This smoke alarm is battery-operated and comes with a battery included. It has a sleek white color and a diameter of 5 inches, with a depth of 1 inch. The First Alert P1210 model features a slim profile and weighs only 0.5 lbs. It is a unit-type smoke alarm that is perfect for home security. This smoke alarm is made in Mexico and does not come with a manufacturer warranty. With its reliable features, this smoke alarm is a must-have for every home.