Pest Offense POBD-I-01 Original Electronic Pest Repeller Easy-too-use electronic pest control without hazardous chemicals or traps Rids home of mice, rats, and roaches by sending electronic impulses through home wiring 1 unit is effective for 1 level of the average size home Built-in surge protector and indicator/nightlight EPA registered; FCC compliant; UL listed The LED lights may vary in color.