The ultra pest repeller emits low-frequency sound designed to repel indoor household pests. It operates without noise or odor and is safe for humans and pets. Plug the device into an electrical outlet; it will activate when the blue indicator light turns on. Simple to use and install. For best results, place one unit in each room to help deter mice, insects, cockroaches, ants, and other common pests. Suitable for indoor use in areas with pest activity. Utilizing ultra technology, results may take 3 to 4 weeks depending on the severity of the infestation. Plug Type: US Plug (compatible with standard outlets in Canada, Mexico, Thailand, the United States, the Philippines, and other regions with compatible voltage) Type: Blue light Color: White Material: ABS Size: 90x56x35mm Package Contents: 6 x Pest Repeller Note: The package includes only the items listed above. Other products are not included. Lighting and display settings may cause slight variations in the color shown in images compared to the actual product. Measurement may vary by +/- 1-3 cm.