Safely send moles and gophers scurrying from your yard unharmed with the Victor® 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 to 6 months on one set of alkaline batteries. Spike must be used continuously for 7 to 14 days before moles and gophers start to move away from the area.