Set of 2 Mole Repeller Rodent Chaser for Garden or Yard Set of 2 mole repellers will protect 15,284 toal square feet!!! Will cChases away rodents unharmed by emitting a penetrating sound, while not affecting pets Easily mount into the ground with the attached lawn stake. Undetectable to humans and pets, and won't interfere with lawn mowers or trimmers. Made of a durable plastic and metal. Req. 2 "D" batteries per repeller.