PNT11A Pest n Trol 5 in 1 Pest Repeller Electronic Vibrawave Technology Pulsating vibrations travel through your wiring to create a giant pest repelling field. Reaches deep into walls and cracks untouched by other pest controls where 90% of the pests nest and breed.Ultrasonics Technology the Exclusive High-Pressure Transducer emits an Ultrasonic Alarm (Inaudible to humans) that drives pests out by creating a hostile environment.Ionic Air Purification & Pest Control the Ionic Air purification pumps out the beneficial ions that clean the air of the pollutants & food odours that attract the pests.Blue-led night light illuminates the rooms with a soft eye-pleasing glow.