In summer, with the increase of mosquitoes and insects, we will drive them away by various methods, such as mosquito repellent, liquid sprayer, and finally mosquito net. However, these traditional methods are harmful and inconvenient. This environmentally friendly and harmless mosquito repellent can be said to be an innovative alternative to these traditional methods. It does not need to be ignited by fire, and more importantly, it contains no harmful chemicals, so it is environmentally friendly and harmless. It uses a metal plate and a resin metal with high conductivity and heat conduction. The low-voltage PTC resistor makes it safer than other electric mosquito repellents. The low-voltage PTC resistor includes an overvoltage protection fuse to prevent fires. You can add natural substances such as eucalyptus oil and lavender oil inside, which can emit fragrance in addition to repelling mosquitoes, and is completely harmless to children.