Formulated with eucalyptus oil, citronella oil and green tea 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 (Green Tea)? includes an aroma stone carved into the shapes of green tea leaves and Kyoto?s Kiyomizu-dera Temple, along with mosquito repellent essential oil. With just a few drops, it can repel mosquitoes, midges, gnats, ticks and flies while releasing green tea 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 green tea scent-?Ideal house d?cor carved into green tea leaves and Kyoto?s Kiyo