Description Features: 1. 7 color lights: The LED coaster with 7 colors is very beautiful. It can be used to decorate your car. 2. Built-in sensor: Equipped with built-in light sensor and vibration sensor, this car cup holder automatically turns on in darkness or vibration. 3. Compatible: 2.6 inch diameter car roller coaster is suitable for any vehicle with cup holder position. 4. Good quality: This product is made of high-quality acrylic panel material, with fine workmanship, very good quality and long service life. 5. Protection: This product can protect the inner wall of the car from being scratched by the water cup and keep your car away from scratches. Description: This colorful atmosphere light coaster material is good, and the light switch is very flexible. It can not only be placed in the car for placing water cups but also used to render the atmosphere of the room. Specifications: Type: LED Car Cup Coaster Material: Acrylic panel Battery: Polymer lithium battery Diameter: 6.8cm / 2.68inch Power supply: USB charging Package Included: 1/2 pc LED Car Cup Coaster+1 /2pc USB Charging Cable Notes: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.