Ultrasonic repeller uses the advanced technology, which can produce frequency conversion ultrasonic wave to affect auditory and nervous system of rats, bats, mosquitoes, cockroaches, and other pests and cause neurological disorder, loss of appetence and mental fatigue, thus making them flee the scene. In addition to the ultrasonic wave repelling function, it also provides the optical repelling function to achieve better effect. It can be widely use in families, hotels, restaurants, supermarkets, offices, warehouses, factories and other places. Features: Ultrasonic repeller is mainly used to repel rats, mosquitoes, flies, cockroaches, bats, ants, fleas, geckos and spiders. It produces ultrasonic wave in a 360-degree all-around way to affect auditory and nervous system of the pests, thus making them flee the scene. In addition to the ultrasonic wave repelling function, it also provides the optical repelling function to achieve better effect. The flashing frequency of 180 seconds is a cycle. It flashes from high to low frequency, so as to avoid the adaptability of rats. No sound, no chemicals, no poisons and odorless, safe to human, 160 square meters effective coverage area in an open environment. With backlit screen for easy viewing, auto off and go to the energy-saving mode in 25 seconds. Advanced and scientific design: intelligent frequency conversion to avoid pest adaptability. Constant/ variable frequency (20-150KHz) mode for different needs. Plug-in type, lightweight and portable, it can be widely applied in families, hotels, restaurants, supermarkets, offices, warehouses, factories and other places. Note: 1. Pests may be active and disorderly about 5-7 days after use, which is normal and you can see obvious effect after 2-3 weeks. Allow the Pest Repeller to operate continuously for best results. 2. The repeller should be installed at 0.5-1.5m away from the floor and vertical to the floor. 3. The repeller should not be plugged in the wall behind the fridges, sofas and curtains, or under the bed. 4. Clean it with dry and soft cloth instead of strong impregnant, water or damp cloth. 5. Size and color may be slight different because of manual measurement and different light conditions, please in kind prevail. Thank you. Specifications: Color: Black/ Red/ Grey/ Green (Optional) Plug: EU/ US (Optional) Voltage: AC 110-240V, 50Hz Material: ABS Power: 2W Sound Wave: Ultrasonic Wave, Electromagnetic Wave, Bionic Wave, Medium Wave, etc. Constant Frequency: 20/ 50/ 80/ 100/ 120/ 150KHz Variable Frequency: 20-150KHz Effective Coverage Area: 160m in the Open Environment Item Size: 125 * 85 * 37mm / 4.92 * 3.35 * 1.46in Item Weight: 70g / 2.45oz Package Size: 15.5 * 11 * 7cm / 6.10 * 4.33 * 2.76in Package Weight: 145g / 5.11oz Package List: 1 * Ultrasonic Repeller 1 * User Manual (English)