Product Description: Name:LED Light Up Coaster Main Material:Acrylic Shape:Round Diameter:10cm / 3.93" Thickness:0.4cm / 0.15" Battery Type:CR1620 Button Cell Battery Light Color:White Light Modes:Steady, Fast Flashing, Slow Flashing Package Included: 1 x LED Light Up Coaster Notes: 1. Transition: 1cm=10mm=0.39inch, 1g=0.001kg=0.0022lb=0.035oz. 2. Please allow 1-3 cm difference due to manual measurement and 3-5 g for the difference between different colors. 3. Due to the screen difference, the color may be a little different from what you expect, please allow it. Coaster made of Acrylic plastic material, which is wear-resistant scratch, high hardness, and stability, its bright mirror can endure high temperature White light has three light modes - Steady, Fast Flashing, Slow Flashing; Colorful light is flashing mode Powered by CR1620 Button Cell Battery, touch the switch button to turn on. No need tools and wiring Creating a romantic inviting space, optimize scenery and lifestyle, supplying you a romantic, exalted and elegant life Suitable for party, dating, family gathering, etc. Widely used in KTV, bars, Coffee Shop, Disco Club, Slow Club, Leisure Club, Club, Park, Garden, Swiming Pool, Restaurant, etc