1、Constant Temperature: Coffee mug warmer is a 55°C smart constant temperature coaster that keeps the temperature at all times. 2、Space Saving: Candle warmer plate only needs palm sized space, small in size, and does not occupy the desktop, keeping the space tidy at all times. 3、Small Portable: The USB candle warmer is compact and lightweight, making it a must have for home, office, and outing. 4、Automatic Function: Candle warmer automatically heats the water cup, automatic power off, safer to use. 5、Tempered Glass: Mug warmer's panels are made of tempered glass, which is waterproof, strong, wear resistant, and durable. 1 x Coffee Mug Warmer  Item Type: Coffee Mug WarmerMaterial: Aluminum Alloy,Tempered GlassInput Voltage: 5V/2AOutput Power: 8 to 10WDiameter: Approx. 10.3cm / 4.1in