DLLL Eco-Friendly Solar Power Ultrasonic Pest Repeller Chaser Snake Rodent Mice Gopher Rat Mole Mouse Repeller for Garden Yard Field Grassland outdoor Easy and safe to use. No Poison, No Chemical. When the solar panels do not charge or night time the LED light automatically open. Solar Powered with rechargeable Ni-Cd Battery.Snake repeller LED lights when the solar panels charging or it will automatically close.A Multi pulse repeller, keeps changing the ultrasonic pulse it emits, so snakes do not get used to it, and do not come near your garden. This item don't have any effect on animals or pets.The ultrasonic waves will irritate them ,simulate danger, and repel them away from the irradiated area. This repeller supports frequency conversion, adapted to your needs.After open the LED light,it will divided into two modes:keep lighting and flashing(every time for 30minutes). The solar mole repeller is effective within an area of 650 square meters.Idea pest control device to keep snakes away from your garden or lawns by utilizing both sonic wave sound and vibration technology.