1. The device emits variable frequency ultrasonic wave to repel mice, rats, roaches, fleas, flies, mosquitoes, spider, moths and other common pests. 2. Voltage: 100-110V or 220-240V, 50/60Hz 3. Frequency range: 35KHz-55KHz, variable 2 sec/cycle. 4. Sound pressure: 90dB, high sound pressure has a better effect to repel pests 5. 6pcs white LED, can be used as a night light and make your home more beautiful 6. With a switch, can turn on/off the night light at any time 7. Effective range: 30 square meters 8. This product is suitable for family, restaurants, hotels, hospitals, office buildings, farm etc