[Car Defroster]: Makes air molecules move violently and generates a large amount of energy, thereby achieving remarkable phenomenon of no ice inside and outside car. [Material ]: Energy substances come from nature. Whether it is a study, living room or bathroom, it can freshen air simply and quickly without any adverse effects on human body. [Same frequency vibration]: Microwaves with a frequency similar to vibration and rotation frequency of water molecules affect physical properties of water molecules, causing them to actively vibrate even at freezing point. [Perfect Match]: The portable essential oil diffuser not only adds a stylish touch to car interior, but also matches perfectly with various car models. [Practical Gift]: Car diffuser for essential oils in car home office and bedroom, give it to your friends or family, they definitely appreciate you. Colour:As Shown Material:Plastic Size:8.4x3.2cm Package Contents: 4 * Car Defroster Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.