PORTABLE & COMPACT:The car aromatherapy diffuser adopts a mini portable design, with a high-end aluminum alloy body and Type-C interface, which can easily plug into the car's USB port or portable power bank, enabling you to use it anytime and anywhere. Whether it's short commutes or long-distance road trips, car diffuser can enable you to enjoy aromatherapy and pleasant fragrances.(Package only includes USB cable, NO adapter included) NOTE: NOT WIRELESS TECHNOLOGY：Car diffuser humidifier uses ultrasonic atomization technology to generate lighter and finer mist, with low noise and no need for a cotton core. It can be added with water according to preference and an appropriate amount of essential oil can be used, paired with colorful gradient lighting to add a sense of atmosphere. The lighting can also be turned off by long pressing for 3 seconds without disturbing sleep.(please prepare essential oils separately) SAFETY:The ultrasonic car aromatherapy diffuser with 100ml water capacity