Product details Feature: The ultrasonic pest repeller use the dual ultrasonic and electromagnetic chips work simultaneously to disorientate the hearing and nervous system of pests to quickly and powerfully drive them away. It can drive away most types of flying and crawling pests such as mosquitoes, spiders, bed bugs, cockroaches, mice, fleas, ants, fruit flies etc. The ultrasonic frequency is inaudible to humans and pets, it is animal-friendly, environmental-friendly, and safe for children. Non-Toxic Chemical Free, the ultrasonic pest repeller is 100% guaranteed safe for your family members and pets. It's widely used in homes, warehouses, offices, gardens, hotels, etc. Recommend you install one for each room because the ultrasound cannot penetrate walls and solid objects. As for large storage area with vermin, we suggest install 2 or more devices. Please make sure to install it vertically 120cm in away from the floor. And make sure there are no barriers like curtains or cabinets covering in front of the repellent. Most customers can see the results within 2-3 weeks! Then we can say goodbye to Vermin! Upgraded Ultrasonic repellent working with low-frequency ultrasound waves, which means that it is gave you extremely silent pest control and can't disturb you and your pets. Why choose us: No any noise for driving pest. Repelling many kinds of pests continuously and Powerfully. Easy to use: Just plug in. 100% Safe and economical: noiseless and no radiation, safe for pregnant woman and baby to use Pack of 6: One package solve all rooms Specifications Material: ABS Rated Power：5W Inaudible Ultrasonic Frequency: 25-65KHz Effective Coverage Area: 800- 1200 Sq. Ft./unit Package Included: 6 packs Package: 6 pcs Pest Repeller The ultrasonic frequency is inaudible to humans and pets, it is animal-friendly, environmental-friendly, and safe for children The ultrasonic pest repeller use the dual ultrasonic and electromagnetic chips work simultaneously to disorientate the hearing and nervous system of pests to quickly and powerfully drive them away It can drive away most types of flying and crawling pests such as mosquitoes, spiders, bed bugs, cockroaches, mice, fleas, ants, fruit flies etc.