Function: Saving space: The candle warmer only needs a hand-sized space, small in size and does not take up desktop, keeping your space tidy at all times. Small Portable: The USB candle warmer is compact and lightweight, making it a must-have for home, office, and on-the-go. Automatic function: candle warmer automatically heats water cup, automatic shutdown, safer to use. Tempered glass: cup warmer panels are made of tempered glass, which is waterproof, strong, wear-resistant and durable. Specification: Item Type: Coffee Cup Warmer Material: aluminum alloy, tempered glass Input voltage: 5V/2A Output power: 8 to 10 W Diameter: approx. 10,3 cm / 4,1 inch List of packages: 1 x Coffee Cup Warmer How to use: 1. Plug and play, the indicator light lights up when the heating is running. 2. When the panel temperature reaches about 100 degrees Celsius, it will automatically turn off and off, then after 1 to 2 minutes, the temperature will drop, then it will automatically turn on and heat up. This cycle is repeated many times, creating a constant temperature state for the last time.