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: 1 x LED light Coaster 1 x Usb cable 【Unique Gravity Sensor Touch Activated】LEDs turn on when cup or anything on it, and turn off automatically when nothing on it.power saving design！ 【Two Power Supply Methods】1.USB Rechargeable:Come with USB cable, the lamp can work without battery after a full charge.2. 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.