Mosquitoes Ultrasonic Pest Repeller - Electronic Indoor Pest Control Plug in for Insects, Mice,Ant,Spider,Rodent,Roach,Rats,Flea,Bug,Mosquito Repellent for Children and Pets' Safe 4 Pack

Ultrasonic Pest Repeller ?Ultrosonic Pest Repeller ?No Poisons ?No Chemicals ?No Insecticides ?No Traps Specifications: Frequency range: 24KHZ-110KHZ Input Voltage: AC90V-250V/50-60HZ Effective Range: 800-1200 square feet Installation height: 20-30cm from the ground Power: <3W Instructions: 1.This machine can be put directly to the AC 220V or 110V plug (Voltage: AC90V-250V, Frequency 50-60HZ. 2.It should be installed at about 12 inch away from the floor and the installing point should be avoided from the back of the curtain,fridge and any other furniture that deterring sound waves. 3.Operating temperature range: 0-40C. 4.Don’t clean the machine with strong impregnate cleanser or damp cloth. 5.Don’t drop the machine and make strong strike on it. 6.It’s Normal that the activity of insects and rodents increase at the beginning of using days,as they are getting away from their living place after the attack of the ultrasonic. Usually it takes 3 weeks to make it all gone. 7.The ultrasonic cannot travel through walls,so it’s better to put 1 or 2 machines in each room.