Speedy shipping, last one! Set of 2 Point 1: Super easy to use, just put it in your car's drink holder! The interior of your car will be illuminated with LED lights, creating a wonderful atmosphere(^^♪ When you place a transparent PET bottle, such as one with water, it will reflect the light beautifully like in the photos, making you feel great(^^♪ Point 2: Built-in 220mAh battery, allowing for up to 8 hours of continuous illumination on a single full charge. It has a sensitive light sensor and vibration sensor, and automatically lights up in the dark when it detects vibration(^^♪ Therefore, it doesn't usually light up, which helps extend the battery life. There are 8 color patterns. Patterns that change one after another! Patterns that stay the same color※ We would appreciate it if you could take a look at the photos. There is a button on the back, long press to turn it on♪ Press it repeatedly to change the colors, so please use your favorite color. Point 3: IP67 waterproof material, so it's okay if you spill cold drinks or juice(^^♪ ※ This product is a set of 2, but if you need 4, please feel free to let us know in the comments section. We may be able to offer a discount on shipping. My thoughts after using it: I actually use it in my car. About a week has passed since I fully charged it, and it's still working. I think it turns off automatically, which helps the battery last longer. You'll understand how good this product is once you try it(^^♪ I really like it. Use it on dates with your girlfriend, when you're hanging out with friends, and show it off a little(^^♪ Thank you for reading the entire product description. Please take a look at my profile for other information.