Portable Solar Powered Outdoor Sound Wave Mosquito Repellent Equipped Snap Hook and Compass for Hiking Camping Biking Fishing The sound waves imitate the male mosquitoes fly frequency 5000-9000Hz repel nuisanced mosquitoes away No battery need other power source, micro solar panel charge under the sun Safe way to repel mosquitoes no poison, no chemical With snap hook design easy to carry Suit for open air activities,fishing,gardening,camping