Ultrasonic technology: Ultrasonic Pest Repeller, Can put out non-toxic ultrasonic waves without radiationUltrasonic Pest Repeller has ultrasonic frequency (20-65 kHz) only directed at insects, mosquitoes, flies and ratsIt offers a high frequency that humans cannot hear, but it is very repellent to spiders and insectsenergy efficient and environmentally friendly: This electric pest control is made of high quality ABS flame retardant materials and consumes less electricityThe device is energy efficient, quiet, safe, environmentally friendly and radiation resistantThe vermin guard must be left plugged in for 24 hours to ensure complete protection100% safe for children and pets: This ultrasonic pest control is one of the easiest methods of eliminating pestsThe ultrasonic frequency is inaudible to humans and animals and completely harmless and safe for pets and childrenAt the same time, it is not with chemical substance and harmful radiation, so it can be used safelyWide usage: It is widely used in homes, warehouses, offices, gardens, hotels, etcIt is recommended to install one for each room because ultrasound cannot penetrate walls and solid objectsFor large storage areas with vermin, we recommend installing 2 or more devices