This is an electronic ultrasonic pest repeller device. Its ultrasonic pest repellent is environmentally safe and has no chemicals it does not kill the rodents, cockroaches, spiders, ants etc. but drives them away. This ultrasonic repeller emits high frequency ultrasonic sound waves to create an acoustically hostile environment that repels rodents, cockroaches, spiders, ants from sound-protected rooms. It does not harm humans. It's kinder than traps, safer than poisons, and completely inaudible to people and non-rodent pets. Unlike traps and poisons, Instructions:- The unit takes 2 to 3 weeks for satisfactory elimination of Household Pest. Good for use at Homes, Offices, Restaurants, Warehouses, Stores, & Switch on. Red light will glow indicating the unit is activated. ProductDescription: 6 in 1 Sliceter Pest Repeller cum Health Care System &bull Effective on Mice, Bugs, Lizards, Spiders, Mosquitoes & Pests • Ultrasonic Sound Waves, Sweep Sound Frequency • Based on the Japanese Technology, Scientific Research has found Ultrasonic Sound Waves attack the auditory & nervous systems of the pests causing them pain & discomfort • The Unit takes 3-4 Weeks for Satisfactory Elimination of Pest • No Fumes, No Harmful Rays, No Bad Odour • Safest & Economical Way of Killing Insects, Mosquitoes & Pests • Direct Plug-in into Normal Sockets • No Use of Polluting Chemicals • Semicircular Space Access for Operation • No Mats, No Chemicals, No Sprays • No Fumes, No Daily Expenses, No Smells • Durable, Long Lasting Heavy Duty Product • Virgin Plastic, High Quality Material.