LONGKO Ultrasonic Pest Repeller, Ecofriendly Indoor Repellant for Mice, Mosquitos, Roaches, Spiders, Insects Intelligent Frequency Conversion & Dual-waves Function: 0.8-8Hz electromagnetic wave and 10-70KHz/25-70KHz ultrasonic wave intermittent alternately, 200sq.m working distance, effectively repels the rats/flies/cockroaches/mosquitos away 2 Adjustable Wave Bands: it can be adjusted for different scenarioschoose band 1 if there's any pets at home, while both band 1 and band 2 suits places without pets) High & Reliable Safety Performance: adopted safety parts and chip, ABS fireproof materials, high anti-interference ability 110V-230V Voltage, less than 6 Watt Power Comsumption, Strong Stability, superior performance w/Radiation Shape Horn Window design, launch a maximum effect of ultrasound and electromagnetic waves, simple and stylish Comfortable Night Lightnot only for night lighting, but to enhance the panic sense in mice, to achieve the repelling effect