Plug and play High-intensity ultrasonic waves (120 decibels) attack the auditory and nervous systems of unwanted pests causing them discomfort that will force them leave your home.You can simply plug the electronic pest controller into the power socket on the wall without any tools. If the room has no barriers, use a unit of about 150 square meters. If the house exceeds 150 square meters, it is recommended to use two or more. ELIMINATES ALL TYPES OF RODENTS INSECTS Protects your house from Mice, Rats cockroaches, Fleas, Flies, Crickets, Silverfish bed bugs, Moths, Ants and other common pests. Dynamic cross frequency conversion technology, mice can't adapt and escape. Effective, all-round repellent effect high power,360 degreeLarge area coverage , strong penetration, 2-wave frequency conversion, 22-85KHZ frequency band, High-frequency and low-frequency ultrasonic waves alternately act on the rat's auditory system and nervous system, make them feel fear, discomfort and escape from the scene. Innovative frequency conversion technology Thanks to the latest three-frequency inverter technology, the continuous alternating frequency of ultrasonic and electromagnetic waves can effectively repel cockroaches, rodents, mice, mosquitoes, ants, spiders and more pests, thereby affecting them Neuro-auditory system.Automatically sweeps the ultrasonic range of 22000 Hz to 85000Hz, to prevent pests form developing a tolerance to the frequency. Usage Simple operation, just plug the spider repeller into the indoor socket and turn on the switch. It is recommended that the pest repeller plug in is 20-50cm from the ground. In the initial stage of use, there is no need to cut off the power supply. It is recommended to open for a long time. Don't use it in a damp place. Features Double wave frequency conversion; Energy saving; Silent output to humans and pets; Coverage control area of 150 square meters; Safe and non-toxic; Material: ABS; Size: 110*30*55 mm Package Contents: 1 * Insect repellent