MATERIAL: Made of high quality ABS material for durability. Eco-friendly materials, non-toxic, safe to use. Creates a romantic and fantastic atmosphere. USB Rechargeable or Battery Powered - Comes with USB cable, the lamp can work without battery after a full charge, can also be powered by: 3 x AAA batteries (not included) Warranty: Provides 100% satisfied service and guarantee. All of our LED luminous coasters are strictly tested exclusively. If you have any problems, please feel free to contact us at any time. We will offer you satisfactory solutions. Multifunctional Drink Coaster - The USB rechargeable luminous coaster can satisfy your needs on different occasions, such as party, wedding, cocktail party, dinner party, birthday party, etc. Perfect for home, bars, KTV, restaurants, clubs, etc. Unique gravity sensor touch-activated energy-saving design, LEDs will light up when a cup or something is on it and automatically turn off when nothing is on it.