Description: 【Efficient USB Heating】: Keep your beverages warm with this USB powered heating coaster, designed to maintain a steady temperature of around 55°C (131°F), ideal for coffee, tea, milk, and more 【Adjustable Timer & Temperature】: Features 5 timer settings and 5 adjustable temperature levels, allowing you to customize the heating duration and warmth according to your preference 【Premium Materials】: Crafted from aluminum alloy and tempered glass for heat conduction and easy cleaning. The sleek design complements any desk or kitchen setup 【Compact & Versatile Size】: With a diameter of 10.2cm (4 inches) and thickness of just 0.7cm (0.28 inches), this cup warmer fits most standard mugs while saving space on your workspace 【Easy Use】: Simple line control switch makes use effortless; powered by USB with an input voltage of 5V/2A and power consumption of only 8 to 10W for energy efficient use at home or in the office Specification: Material: Aluminum alloy, tempered glass Size Chart: 10.2cmx0.7cm/4.02inchx0.28inch Package Includes: 1 Coffee Mug Warmer Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.Customer satisfaction is our primary concern. If the product is somehow cracked or broken during shipping, please feel free to contact us. We will try our best to give you a satisfactory solution.