SAFE & EASY TO USE: Forget the chemicals and traps typically used in households, all you need to do is plugging this device and choose modes, then it will start doing its work by emitting high impact pressure wave and 25KHz-65KHz changing ultrasonic sounds. The ultrasonic rodent repellent is 100% safe to human and pets because it drives away rodents like rats and squirrels without using any chemicals or poisons, which do not harm people or pets like cats and dogs. FOUR FUNCTION SWITCHES: MAGIC CAT rodent repellent has four function switches for you to adjust the operation modes. TEST = test tone (Simulates the sounds that rodents hear, check the ultrasonic sound works or not). ULTRA = ultrasonic sound (Repels mice effectively). TRANS = pressure waves (Repels rats & squirrels effectively). DUO = pressure waves + ultrasonic sound(Repels all rodents that mentioned above). You can choose the mode that you need. 360°POWERFUL PROTECTION: MAGIC CAT squirrel repellent is equipped with a transducer and dual speakers, which can emit high impact pressure wave and 25KHz-65KHz changing ultrasonic sounds to disturb the central nervous systems of rodents in your house. Creating an unfriendly living environment for rodents to discourage them from entering the protected area again in a long term. HUMANE & ECO-FRIENDLY: Unlike poisons, traps or other repellent devices, the MAGIC CAT cruelty-free pest repellent is a humane way to drive pest away with harmless ultrasonic sounds and pressure waves instead of killing them, so there is no need for you to worry about cleaning up. It does not only minimizes the direct contact between human and other disease-bearing rodent, but also protect the environment and maintain the balance between human and nature. EFFECTIVE & WIDE OPERATION: This ultrasonic rodent deterrent can protect an area measuring 5,000-6,000 sq.ft effectively with high-frequency sound waves. It can keep squirrels, chipmunk, mice, rats and most of the other common rodents away from your indoor area effectively, like your garage, attic, basement, warehouse, barn, kitchen, living room, etc. Since squirrels are common throughout USA, it is a effective way to deter squirrels by achieving a long-term and cost-effective solution.