The Nature ABS Repeller with Ultrasonic Sounds works for both moles and voles and is equipped with a solar-powered battery that lasts for 14 days when fully charged. The ultrasonic repeller produces an ultrasonic sound every 30 seconds. Because moles' hearing is very sensitive to ground vibrations, moles are bothered by these transmissions, as they simulate the presence of predators. The device should be pressed into the ground close to the entrance of a molehill.