This long-lasting insect repellent formula is gentle, smokeless, and odorless, providing long-lasting insect repellency for the whole family. Its silent design provides a comfortable sleeping environment for your family, and it requires no electrical connection, allowing it to be used anywhere. Using the latest eco-drive system, it maintains effectiveness for 150 days with just two batteries (based on 8 hours of use per day). The power of its special fan and motor significantly improves efficiency. A special cartridge effectively disperses the agent.