[Ultrasonic Repeller]: ultrasonic repeller devices emit a consistent high frequency noise that is too high for humans to hear. The sound waves are designed to disrupt, irritate, and deter common household like mice, roaches, spiders, mosquitoes, ants, and rodents. [Wide Coverage]: This ultrasonic control operates silently so you can calmly set it up in a child's room, bedroom, or guest room. Each device can effectively cover and control an area of up to 115. One device per room is recommended. Note that ultrasonic waves cannot pass through solid materials and walls, so do not place furniture or any other objects in front of it and keep doors and closed to allow ultrasonic waves to expand and work. [Safe to Use]: Ultrasonic Repeller is human and pet friendly, keeping at bay all sorts of little enemies such as mice, rats, mosquitoes, flies, beetles, cockroaches, moths, ants, bedbugs and more. [Easy to Use]: Simply plug into an electrical wall socket. You can completely mosquitoes, fleas, ticks, mice, moths and so on. No need to clean up dead bugs and keep your home always clean. [Wide Range of Applicatons]: The device can be used in both indoor and outdoor areas such as garages, basements, attics, utility rooms, balconies, etc. Ultrasonic Repeller with out any chemicals, radiation or odors, 100% safe for human and pets. Keeps away from your home or office, it's suit for house, warehouse, office, hotel. Plug Type:US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on. Voltage:AC110V Colour:White Material:Plastic Package Contents: 6 * Ultrasonic Repeller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.