Features: <br><br> 4 Repelling Modes to choose from<br> 12 powerful LED strobes that can be turned on or off<br> An ultrasonic speaker emitting High-frequency ultrasounds<br> An impulse transducer transmitting intermittent impulse attack waves<br> An audio speaker playing audio recordings of rodents' predators<br><br> This rodent repellent is easy to use. Simply plug it into an outlet in the room you want to protect from rodents, set the repelling mode and turn on the LED strobe lights based on your needs, and it will start to do its job.