Onegood Practical Ultrasonic Garden Yard Solar Power Mouse Snake Gopher Rodent Mice Mole Pest Repeller Chaser Transmitting ultrasonic via vibration. Easy and safe to use. No Poison, No Chemical. Idea pest contral device to keep rodents away from your garden or lawns by utilizing both sonic wave sound and vibration technology. Frequency: 400-1000 Hz Panel Size: Approx. 70*90MM