Specification: Condition: 100% Brand New Main Material: Wood + Metal Type: Bright Wooden Grain, Dark Wooden Grain (Optional) Power: 5W Voltage: 5V Electric Current: 1000mA Max Working Temperature: 80℃ Wooden Grain Width: Approx. 16mm / 0.62inch Metal Plate Diameter: Approx. 75mm / 2.95inch Whole Diameter: Approx. 103mm / 4.05inch Weight: Approx. 108-109g Package Included: 1 x Cup Warmer with USB Cable(Cups are Not Included) Note: Please don't use the recessed bottom cup, mineral water bottles, adiabatic vacuum cups or cups with thick bottom. It is only used to keep your tea or coffee warm, but not for heating. Please allow slight deviation for the color and measurement. Thanks for your understanding. Due to the material, the color and texture of the product may be slightly different. Please buy with caution. Premium Material: This warm coaster is made of premium walnut and metal materials. Heating evenly, heating up quickly, easy to use and durable. The appearance is made of natural walnut wood texture, which is not only stylish and simple, but also glossy and comfortable to use. USB Port: Our coaster warmers use a 5V USB output port, as long as you find a device with a USB port, you can power your coaster, such as your computer, desktop, laptop, tablet, power bank Wait. Good Performance: This heated coaster not only has good stability in itself, but also guarantees your basic needs in daily use. At the same time, it keeps your coffee, tea or other hot beverages at around 80°C during the heating process. Don't worry about high temperature and high oxidation, protect your health. Easy to Carry: Light weight, small size, easy to carry, suitable for most stainless steel cups, feeding bottles, ceramic cups, glass cups, etc. Power supply is simple and convenient. Perfect Gift: Our coasters are not only lightweight, but also compact in size and fit most stainless steel mugs, baby bottles, ceramic mugs, glasses, and more. Stylish and functional, this compact vacuum bottle warmer is the perfect gift for family and friends for Thanksgiving, Christmas, Birthday, Valentine's Day, and more.