Gangnam Shop RC-501 Solar Energy Snake Mole Repeller with LED Light for Outdoor Garden Yard RC-501 Solar Energy Snake Mole Repeller with LED Light for Outdoor Garden Yard This item is asnake mole repeller which is solar powered. It is launched by ultrasonic vibration to influence the underground rodents acute hearing which can effectively prevent snakes. Ultrasound can deceive them and make them feel dangerous and leave the vibration area.