Ultrasonic snake repellent working principle: Detaupeur will vibrate every 30 seconds and send low frequency sound pulses of 400-1000 Hz in all directions. Anti mole scares away invading animals by stimulating their central nervous system. Safe and effective: no need for drugs or other killing tools, snake repellent can easily chase away animals such as dogs , foxes, minks, raccoons, mice, skunks, wild boars, bats, birds, etc. Mole hunting harmless to the human body, the environment and animals, very suitable for gardens, farms, greenhouses. Moles eliminate has a wide range of action: this mole killer is centered at the installation site, with an action radius of approximately 15 meters and an impact range of 700 square meters. For better effect, it is recommended to install 1-2 mole repellent every 36m. Energy saving and waterproof: Solar mole repellent powered by solar energy, no additional batteries required is necessary, saving you a lot of energy. Mole trap has IP65 waterproof