Features - Exquisite workmanship, easy to use and clean. - Perfect for restaurant, KTV, bars, festivals, etc. - Made of high quality ABS plastic material, durable to use. - Light flash button induction by gravity flow. Just put the cup, it will illuminate automatically -Perfect for Bars, Clubs, Cocktail Parties and More! Specifications: Type: LED Coaster Material: ABS + PC Diameter: 9.5cm Height: 2cm Color: White light, Colorful Light(optional) Powered By: USB/3 x AAA Battery(Not Included) Colorful Light Introductions: RGB 3-LED flashing circularly and alternately to form colorful lights Light Principle: Turn On/Off the light by putting down/take away the cup. Note: Please place the drink/cup more than 150g Package include: 4 x LED light Coaster 4 x Usb cable Unique gravity sensor touch activated power saving design, LEDs turn on when cup or anything on it, and turn off automatically when nothing on it. USB Rechargeable or Batter Powered- Come with USB cable, the lamp can work without battery after a full charge, also can powered By: 3 x AAA Battery(Not Included) MATERIAL: Made of high quality ABS material for durability. Environmentally friendly materials, non-toxic, safe to use. Creating a romantic and amazing atmosphere. Multipurpose Drink Coaster - The USB rechargeable light up coaster can satisfy your needs of different occasion, such as party, wedding, cocktail party, dinner party, birthday party, etc. Ideal for home, bars, KTV, Restaurant, clubs, etc. 【Wide Applications】In addition to being widely used in various bars,the Acrylic Coasters for Drinks is popular in hotels, restaurants, cafes, houses etc, which make the party atmosphere better and more fun