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. 

with additional disassembled battery slot. Materials:Aluminium. Battery:4 pcs“D”size(not included).NO traps, NO poison. Safe for Children and Pets. Frequency: 400 Hz -1000 Hz, Effective range: 600 M². Repeats sonic waves at 20 to 40 second interval