GoXteam Ultrasonic Repeller Pest Control(2 Pack) -Electronic Mou [SMART HIGH TECHNOLOGY]: Adopting the latest dual-chip, this mouse repellent emits different frequencies of ultrasonic wave to irritate nervous system of insects and rats, making them feel uncomfortable and flee away gradually. Intermittent changes in ultrasound frequency prevents them from developing immunity and adaptability. [ENVIRONMENTAL & HARMLESS]: The design of this ultrasonic pest repeller is only targeted at insects and mice instead of your families and pets. The pest repellent features non-toxic, odorless, no chemicals and no radiation. The pest repeller is safe for babies, pregnant women and your lovely pets. [LARGER COVERAGE]: The effective coverage of each pest control is up to 1600 square feet. It is recommended to install this pest repeller vertically from 32-47 inches away from the ground. For a best result, equipped each room with one pest repellent. [LIGHTWEIGHT DESIGN]: The ultrasonic pest repeller is portable and easy to install, just plug and play. Widely used in home, warehouse, office, garden, hotel, etc. Energy saving, keeps you safe from pest intrusion all day long without worrying your bill. [EXCELLENT AFTER-SALES SERVICE]: GoXteam warrants its products for a period of 60 days after the date of purchase. Please note that our mosquito repellent takes 3 or 4 weeks to achieve obvious results. If there is no effect after 3 weeks, we provides you with a no-hassle money back guarantee.