Intelligent techChristmasogy: Ultrasonic repeller is equipped with the latest chip to constantly change the ultrasonic frequency between 25-85kHz to disturb and irritate the parasitic nervous system. Suitable for most pests: Effectively repel all types of pests. Such as mice, bats, cockroaches, mosquitoes, fleas, spiders, flies, bees, rodents, etc. Specifications: Frequency:25-65 KHz Operating voltage: AC 90V-250V / 50HZ Power: 5W Plug: EUR standard Weight: 50g(single) Effective coverage: 80-120m2 (enclosed space) Use of ambient temperature: 0~40°C