1.Effective Range:625sq.m 2.Emits a sonic tone every 30-40 seconds 3.Waterproof 4.Eco-friendly 5.CE,ROHS Approval Smart Solar Mole and Gopher Chaser1. Transmitting ultrasonic via vibration. Pest repeller is used to affect the acute hearing of underground rodents,with very effective preventive effect. The ultrasonic will deceive them, making them feel endangered,so as to force them away from the ...