Holmes  Smoke Grabber Ashtray and Odor Eliminator, HAP75-UC2 Carbon filter absorbs smoke and odors Easy-to-clean removable tray Powered by two (batteries Carbon filter helps absorb smoke for cigarettes or cigars Battery-powered (requires 2 D batteries, not included) Dishwasher-safe removable tray Automatically turns off when lid is lifted Helps eliminate smoke while smoking