This item is not only a cup mat, but a LED light for car interior decoration. It will automatically turn on at dark when it feels vibration, and turn off after about 15s if sense no vibration, make it easier to find the drink slot. It is easy to install, no tools or wiring needed. Perfect for all kinds of cars. Features - Light color: Blue. - Material: Acrylic. - Size: Approx. 7.2 x 7.2 x 1cm/ 2.8 x 2.8 x 0.39 inch (LxWxH). - Light Delay Time: About 15s. - Charge Way: Solar charging. - Battery: 200mA, Rechargeable. - Solar rechargable LED coaster cup pad, automatically turns on at dark when it feels vibration, and turns off after about 15s if senses no vibration. - Simply fit into the bottle holder on your car to make your car more attractive. - Made of premium material, eco-friendly, durable, non-toxic, odorless. - Easy to install, no tools or wiring needed. Universal for all kinds of cars.