StillCool Solar Powered Sonic Pest Repeller Mole Repellent Repels Deterrent Mole/Rodent/Vole/Shrew/Gopher REPEL: Emits sound wave that can drive away moles, voles, mice and rats 650 Square Meters.build a safer place for you and your family. EFFECTIVE: Send out a burst of sonic waves in every 30 seconds, of course the rats hate this sound and treat it as a symbol of danger, so, just wait for the rat rush their way out of your property for their lives.100% safe, compare with those expensive and dangerous chemicals and tools, would it be nice to use this one? ECONOMICAL: Powered by a solar cell, no need for extra batteries. The unit will automatically collect energy from the sun during daytime in order to continue operating, during the night, which means your premises are impenetrable to all these unwanted visitors 24/7. LONGER ALUMINUM TUBE: Can be plated into the ground deeper and more firmly. Insert the spike firmly into the ground and enjoy the pest free environment. WEATHERPROOF: Suitable for all weather conditions. But Choose the best sun location, so the solar panel to can receive the light as directly as possible.