The solar panel is polysilicon 5.5V/2W. Adopt silent fan, the noise is as low as 45db. High vibration sensor, automatic on-board switch. Multiple filtration system. Double anion purification.You can add aromatherapy and fragrant balls. Unique sliding customer experience. A switch that controls the left light. Three working modes: [Mode 1] Blue indicator light: it starts with the vehicle and automatically turns off within two minutes after parking (this mode is the default mode of the system). [Mode 2] Red indicator light: This mode is a powerful mode, and it is recommended to use new with serious odor inside. When using, you must connect the power supply and open more than half of the sliding cover to obtain a larger air output (the purification box will work until the power is exhausted). [Mode 3] Green indicator light: This mode will emit negative oxygen ions for ten minutes after parking, which is suitable for use when you stay in the car for a long time after parking (starting with the car, negative oxygen ions will be generated for ten minutes after parking). [Light button]: The LED indicator can be turned on or off at any time. The red indicator flashes twice and the machine is turned off. Three filtration : anion filtration system+activated carbon filtration system+photocatalyst filtration system. Two aromatherapy functions: solid aromatherapy or liquid essence can be added. Colour:black Material:plastic Size:182 x 150 x 45 mm Package Contents: 1 x 1 x skid pad 1 x car charger 1 x cleaning brush 1 x USB cable 2 x Fragrant tablets Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.