Easy to use: Insert the insect repellent ultrasonic plug into the electrical outlet; when the blue light is on, the ultrasonic repellent starts to repel many kinds of pests against rodents, hamsters, mice, fleas, ants, mosquitos, flies, spiders, cockroaches, bedbugs, rodents and insects Wide effective coverage area: The effective area of insect repellent can reach 1600 square meters; Please place one rodent repellent in each room, because ultrasonic waves cannot penetrate walls and solid objects, 6-12 are enough to repel pests in the house (depending on the pests severity of intrusion) Quiet and Effective: Ultrasonic insect repellent uses low-frequency ultrasonic waves that are difficult for humans to hear. But very effective against rodents and vermin, the ultrasound gets them out of your home in no time Ultrasonic insect repellent principle: through low-frequency ultrasonic waves, stimulate the brain and auditory nervous system of mice and pests, effectively repel most types of pests LESS BATTERY CONSUMPTION: Keep you away from cleaning up dead pests, odors, and carcasses with the plug-in bug zapper, no batteries needed, saving a lot of money. Package contains: 6* Note:1. Please allow a little error due to manual measurement. Please make sure you don't mind before bidding.2. The color may vary due to different monitors, please understand. Note:Hello, please pay attention to your delivery address when purchasing products. If your receiving information (such as: name, street, house number, doorbell/email without name, etc. is incorrect, the order will not be delivered correctly.)