The Solar Rodent Repeller emits sound waves that can drive moles, voles, mice and rats out of an area around it of about 650 square metres. It is especially suited for use in gardens and lawns. Every 40 seconds or so, it sends out a burst of sonic waves, which to rodents sound like their natural danger signals and so cause them to evacuate and avoid the area. The Solar Rodent Repeller is powered by a solar cell that converts the energy of the sun into electricity to charge up the built-in batteries. When fully charged, the batteries have enough power to operate the repeller through the hours of darkness and maintain continuous 24-hour protection.