Smart Sensing: Utilizes the vehicle's ignition sensing device for automatic on/off operation, eliminating the need for manual intervention, thus ensuring convenience and peace of mind Three Modes: Add water and essential oil, then press continuous mode for the first time, intermittent mode for the second time, and power off for the third time. Whether you like it strong, medium, or light, you're in control. And the smell lasts all day Low Noise Operation: Enjoy a peaceful and relaxing drive with our car aroma diffuser, as it operates with minimal noise levels. The quiet operation ensures that you can focus on driving without any distractions Easy to Use: This car aromatherapy diffuser is designed for convenience and simplicity. The product comes with a universal air clamp that can be easily clamped on the air conditioning outlet. The compact size make it easy to place in the desired location for optimal scent diffusion Note:Due to everyone's different sensitivity to odors, You can try different kinds of perfume, and perhaps there will be a fragrance that you like.