Ultrasonic Rodent Repeller, effectively drive away rodents and other pests --Ultrasonic Rodent Repeller consists of a transducer and dual speakers, emits high impact pressure wave and 22KHz-35KHz changing ultrasonic sounds, 9 LED strobe lights disturbs rodents activity in a dark environment, being extremely irritating to rodents --No kills, no poisons, no traps, no chemicals, this pest repellent ultrasonic plugin is completely friendly for humans and pets. Just plug the mice repellent plugins into the socket and free your hands --Effectively drive away rats, mice, squirrels, cockroaches, spiders, and more from your room, basement, attic, garage, kitchen, office, warehouse, and other indoor areas Input Voltage: AC 100-240V Working Voltage: DC 9V Energy Consumption: Less than 2.25W Ultrasound Frequency: 22-35kHz /25 kHz dB Value: 100-125dB Effective Coverage: Up to 1076 square foot Item Size: 3 x 4 x 3 in TESTwith Blue light ) With the blue light ON, accompanied by ultrasound at an audible level, checking the ultrasound speaker is working properly ULTRA ( with Blue light ) With the blue light ON, the ultrasonic sound at variable-frequency ultrasonic waves with 22-35Khz. In this mode, the pest repeller can effectively repel mice, rats, cockroaches, spiders, ants, etc. TRANS ( with Green light ) With the green light ON, the ultra-strong ultrasonic sound at a fixed frequency of 25KHZ. In this mode, the pest repeller can effectively drive away squirrels and other rodents DUO ( Blue & Green light ) This mode is the combination of ULTRA and TRANS mode. In this mode, the pest repeller repels all rodents and insects. If you have rodent problems, you can use this model to drive them away Pest Repellent Ultrasonic Plug in, Easy to Use and Creates A Comfortable Environment for the Family