Refastmon Ultrasonic Pest Repeller, Mosquito Repellent, Insect Repellent, Pest Repeller Plug in,&nbsp;Electronic Mouse Trap, Pest Control Ultrasonic Repellent, Mouse Traps That Work-2 Packs ULTRASONIC PEST REPELLER-This pest control ultrasonic repellent works by emitting a disorienting pulse. The pest reject ultrasonic repeller is very effective in pest control and keeps pests away from your home or office. ENVIRONMENTAL FRIENDLY- This pest repeller sends low frequency ultrasonic sound waves that damage pests nervous systems. The ultrasonic waves only target pests providing the safest environment for your children and pets. EASY TO INSTALL-This is a plug and go product. Simply plug it into an outlet, a small LED lights on red and rodent repellent starts emitting ultrasound waves. WIDELY USED- This ultrasonic pest repellent can be used in many different settings, such as kitchen, living room, play room, and bedroom. It can work where there is a pest problem and an outlet. One room with one unit for better efficiency. EFFECTIVE COVERAGE-This electronic pest control covers indoor area up to 1200 SQ FT. All you need is to plug in repeller each room and power it on, then you can say goodbye to all disgusting pests.