Description:This car USB air diffuser is convenient to use, user-friendly, no need any complicated setups.The car air humidifier has a large capacity water container to provide a long work time.The car air humidifier won't make much noise while working, comfortable to use.The USB air humidifier has anti-dry protection, safe to use, the humidifer is not easy to malfunction.The air humidifier is made of ABS and silicone, not easy to be damaged, not easy to break.