Electronic Ultrasonic Pest Electromagneti Repeller Mouse Rat Spider Roach Features: UPGRADED PEST REPELLENT: Adopted latest micro chip AI conversion frequency technology, emits ultrasonic, electromagnetic and biomimetic wave, which disrupt pests' central nervous system to force them leave your home, warehouse, office, etc. ECO-FRIENDLY & HUMAN IMMUNE: Non-toxic, radiation-free, chemical free, 100% safe for your families and pets. Two speakers emits small sound, they're safe for humans. SATISFACTION GUARANTEED: Normally, it costs 3~4weeks for a distinct result. No mice can escape our ultrasonic Specifications: Repels Bugs, Ants, Mice, Cockroaches, Mosquitoes, Spiders, Rats, and More Non-toxic& Environment-friendly Standard Wall Plug-In Indoor Use Only Ultrasonic Frequency:24~74KHZ Power Source: AC90~250(V) Power: 3W~6W Effective coverage area: ≤200㎡ Installation: Simply plug the product to socket. 10-30 inches above from the ground is recommended for crawling pest, and 31-47 inches for flying pest. Package Included: 1 x Ultrasonic Pest Repeller 1 x Manual