Formulated with eucalyptus oil, citronella oil and Kyoho grape essential oil, this essential oil contains PMD, which is a natural mosquito repelling ingredient endorsed by the U.S. Centers for Disease Control and Prevention (CDC) and the U.S. Environmental Protection Agency (EPA). ?Ding Ding Mosquito? Complete Mosquito Repellent Aroma Stone (Kyoho Grape)? includes an aroma stone carved into the shapes of Kyoho grapes and Matsumoto City in Nagano Prefecture (Shinshu), along with mosquito repellent essential oil. With just a few drops, it can repel mosquitoes, midges, gnats, ticks and flies while releasing Kyoho grape aroma. Free of DEET and camphor, it is relatively safe to humans, animals and the environment.Functions:- Contain PMD, a natural anti-mosquito ingredient endorsed by the U.S. CDC- Effective in repelling mosquitoes, midges, gnats, ticks and flies-?Repelling mosquitoes while releasing a relaxing Kyoho grape scent- Ideal house d?cor carved into Kyoho grapes