Highendberry Ultrasonic Pest Repeller, Pest Repeller Plug in for Pest Control, Electronic Rodent Repellent Indoor Use for Bug Spider Ant Mice Roach Other Insects(6 Pack) SAFE FOR HUMAN and PETS: Different from the traditional repellent, this electric repeller works more environmentally without harmful chemical but uses ultrasonic frequency(22-65Khz) sound waves to drive pests and insects away without killing them. Please note our ultrasonic repellers usually takes 3-4 weeks to make effect. WARNS: If you are finding an instant solution, please select other chemical repellents USE FOR MANY PLACES: This pest control ultrasonic repellent is used for Repelling mice, mosquitoes, ants, rats, roaches, spiders, rodents, bugs, flies, fleas and other insects. Applicable for living room, kitchen, bedroom, bathroom, workshop, big apartment, garage, warehouse, parking lot, etc. WIDE EFFECTIVE COVERAGE: The effective coverage of each pest control is up to 1600 square feet. It is recommended to install this pest repellent vertically 32-47 in away from the ground/floor. Since ultrasonic sound can not penetrate wall and solid object, one room one unit is recommended. As for large storage area with serious pest infestation, additional units is required. UPGRADED PEST CONTROL TECHNOLOGY: Adopts safe and advanced effective technology to disturb and irritate the nervous system of pests, which is more powerful which make pests and rodents are harder to immunize than before. Just Plug the ultrasonic repeller in a power outlet and the lights will be on which means the pest control is working. SATISFIED AFTER-SALES SERVICE: We devote ourselves to provide you with professional technical support and guarantee 100% refund for quality problems within 60 days. We are welcomed to CONTACT US: click into our store page, click"ask a question" if any questions.