Round LED Coasters: Each coaster features 6 LED beads and offers a choice between Colorful LED or Cool white LED options. ON/OFF Button & 3 Lighting Modes: The coasters have an ON/OFF button and offer 3 lighting modes: One Touch for quick flashing, Twice Touch for slow flashing, and Triple Touch for constant lighting. Acrylic Coasters: These coasters are made of durable Acrylic material. The battery panel is embedded in the LED coaster panel, so avoid washing them directly. Instead, clean them with a wet duster cloth. They are also environmentally friendly. Daily Waterproof: Do not wash the LED coasters directly to prevent electrocution. The coasters are powered by 2 * CR1620 batteries, which can be a little tricky to replace. start by ripping off the white sticker. and the acrylic panel can recycling using. Widely Application: These coasters are suitable for decoration at parties, weddings, bars, Halloween, Christmas, home pubs, and for both indoor and outdoor use.