Safely send moles and gophers scurrying from your yard unharmed with this Sonic Spike. When placed in the ground and activated sonic pulses penetrate the soil emitting a sound that is highly irritating to moles and gophers who are virtually blind and sensitive to sound and vibrations. Climate permitting leave the Sonic Spike in the ground to repel new generations of pests. This spike is designed with a convenient removable battery sleeve for trouble-free battery replacement. One spike will work for 4 ? 6 months on one set of alkaline batteries. Spike must be used continuously for 7-14 days before moles and gophers start to move away from the area.