It emits powerful sonic waves (Intermittent Combination of Sound and Vibration) to the keen ears of underground rodents (moles, voles, etc.)  Weatherproof, water-resistant and UV-resistant. 

Materials: Durable ABS plastic. Battery: 4 pcs “D” size (not included). NO TRAPS, NO POISONS. Safe for Children and Pets. Frequency: 400 Hz -1000 Hz, . Effective range: 600 M². Repeats sonic waves at 20 to 40 second interval.