EFFECTIVE PEST CONTROL SOLUTION – The ultrasonic pest repeller is equipped with the latest chip to enhance the ultrasonic waves, and it constantly change the ultrasonic frequency between 22-65KHz to disturb and irritate the nervous system of pests. To make them uncomfortable and force them to leave your home and never become immune to the sound. Effectively to repel all kind of pests. Such as mice, cockroaches, spiders, ants, fleas, mosquitoes, flies, bees, bats, rodents, etc. 100% SAFE FOR HUMAN & PETS – The ultrasonic waves launched by this ultrasonic pest repellent only affects the pests and inaudible to human and pets. So doesn’t adversely affect pregnant women, child, baby even pets. The pest control ultrasonic repellent just drive pests away without killing them: No poisons, No radiation, No chemicals, No odor. Gives you a 100% safety guarantee. LARGE COVERAGE AREA – Each pest reject ultrasonic repeller can cover area up to 1200 Square Feet. To achieve the best results, one unit for each room is recommended that every corner of your home can be all covered and protected. The ultrasonic pest control repeller can be widely used in house, restaurant, supermarket, garage, hotel, office, warehouse, hospital, etc. If you have a serious pest infestation or large storage areas, you can add more units for better results.