product features: Ultrasonic interference technology is used to stimulate and destroy the central nervous system and auditory system of rats, cockroaches and other pests, making them feel panic, listless, unbearable and escape from their homes. 1. There are 3 LED strobe lights on three sides of this product, affected by light control, it is not bright during the day and is bright at night 2, 4 kinds of function switches: TEST: Simulate the sound that rodents can hear to prove that the product can work normally, and the blue indicator light is on ULTRA: 22-35kHz variable frequency ultrasonic starts to work, and the blue indicator light is on TRANS: 25kHz fixed-frequency ultrasonic starts to work, and the green indicator light is on DUO: Two kinds of ultrasonics work at the same time, the blue and green indicator lights are on at the same time 3. Effectively drive away squirrels, mice, and other rodents, non-toxic and harmless, no chemical reagents, safe to use 4. Easy to use, plug and play Product parameters: Product Name: Three-sided Ultrasonic Rat Repeller Product model: UR02 Working voltage: DC 9V/300mA Input voltage: 100-240V, 50/60Hz Product power consumption: less than 2.7W Effective Range: Up to 120m (1290sq.ft.) Ultrasonic frequency: 22-35/25kHz Decibel value: 100-125 dB