Color Blue Material Acrylic About this item 2-in-1 Function: Drink Coaster Mug Glass Cup and Coffee Mug LED RGB atmosphere lamp, convenient and safe to be used as a cup holder in the car, also good for car interior decoration Light and sensitive movement: The cup mat s Automatically turn on with blue light at dark when it senses vibration, and turn off after about 15s, make it easier to find the drink slot Two ways to charge: just leave them in the sun or plug in the micro-USB charger (included); IP67 waterproof, no worry about water damage in daliy use Diameter: 6.5cm/2.6inch, universal for all kinds of vehicles which come with holder cup, good for long car rides at night, looks fantastic in cup holders Easy to install, no tools or wiring required; Made of high quality Acrylic and energy saving LED wick, have the right amount of brightness, no eye blinding that will distract the driver, just enough for decorative purpose