Want to get rid of fleas? Just plug the Flea Beacon in and walk away. Based on the light & heat principle, attraction is generated by a light bulb underneath the top of the trap. When the fleas jump in the trap, they rebound onto the sticky catch tray below and are trapped. The product works best at night & can be moved from room to room for total indoor flea control. The trap also breaks the breeding cycle by catching adults before they have a chance to lay eggs.