... InstallationAdvantages:A device powered by solar energy, making use of sound waves to repel harmful rodents (moles, voles, ect.).By ... Rodent Repeller drives away underground rodents very effectively.The sound waves irritate them , simulate danger, and repel them away ... enviromental criteria.No poison, no chemical.Installation:Connect the two cable line together.Tighten can not depart easily (please ...